diff --git a/sources/tech/20200703 How to Create a Pareto Diagram -80-20 Rule- in LibreOffice Calc.md b/sources/tech/20200703 How to Create a Pareto Diagram -80-20 Rule- in LibreOffice Calc.md
new file mode 100644
index 0000000000..b001992a6c
--- /dev/null
+++ b/sources/tech/20200703 How to Create a Pareto Diagram -80-20 Rule- in LibreOffice Calc.md	
@@ -0,0 +1,146 @@
+[#]: collector: (lujun9972)
+[#]: translator: ( )
+[#]: reviewer: ( )
+[#]: publisher: ( )
+[#]: url: ( )
+[#]: subject: (How to Create a Pareto Diagram [80/20 Rule] in LibreOffice Calc)
+[#]: via: (https://itsfoss.com/pareto-chart-libreoffice/)
+[#]: author: (Dimitrios Savvopoulos https://itsfoss.com/author/dimitrios/)
+
+How to Create a Pareto Diagram [80/20 Rule] in LibreOffice Calc
+======
+
+_**Brief: In this LibreOffice tip, you’ll learn to create the famous Pareto chart in Calc.**_
+
+The [Pareto Principle][1], also known as the 80/20 Rule, The Law of the Vital Few and The Principle of Factor Sparsity, illustrates that 80% of effects arise from 20% of the causes – or in layman’s terms – 20% of your actions/activities will account for 80% of your results/outcomes.
+
+Although the original observation is related to [economics][2], it can be widely adopted and used across all aspects of business, economics, mathematics, and processes. In computer science, the Pareto principle can be used in [software optimization][3].
+
+Let me show you how to create a Pareto diagram in [LibreOffice][4] spreadsheet tool, i.e. Calc.
+
+### Creating Pareto diagram in LibreOffice Calc
+
+![][5]
+
+To be able to create a Pareto diagram, you need these three basic elements:
+
+  * The factors, ranked by the magnitude of their contribution
+  * The factors expressed numerically
+  * The cumulative-percent-of-total effect of the ranked factors
+
+
+
+First, enter the data in a spreadsheet. Now let’s get started!
+
+#### Step 1: Sort the data
+
+Mark all rows from first to the last and at the **Data** tab click on the Sort option. At the **Sort Criteria** tab choose **Sort key 1** and change the entry to **Number of Errors** or whichever name you choose. Make sure to tick **Descending** and finally **OK**.
+
+![][6]
+
+#### Step 2: Create the Cumulative Percentage values
+
+To calculate the cumulative percent of a total, you will need one formula for the first cell (C5) and a different formula for cells C6 and below.
+
+**Generic formula for the first cell**
+
+```
+=amount/total
+```
+
+**In the example shown, the formula in C5 is:** =B5/$B$15
+
+**Generic formula for the remaining cells**:
+
+```
+=(amount/total)+previous cell result
+```
+
+**In the example shown, the formula in C6 is:** =(B6/$B$15)+C5
+
+By dragging the fill handle down, you will get the correct formulas for the remaining cells.
+
+![][7]
+
+#### Step 3: Create the Pareto diagram
+
+To create the chart go to **Insert** tab and then click on the **Chart** option.
+
+In the upcoming Chart Wizard choose the chart type **Column and Line** with **Number of lines** set to 1 and click Next.
+
+![][8]
+
+Select the correct data range **$A$4:$C$14** by either using your mouse in the data range selector or by entering it manually. Leave the settings **Data series in columns**, **First row as label**, **First column as label** and click Next.
+
+![][9]
+
+The following Data Series window should have everything filled in correctly, click Next.
+
+![][10]
+
+In the last window enter titles and remove the legend:
+
+  * Title: Pareto chart
+  * X axis: Error Type
+  * Y axis: Number of Errors
+  * Untick **Display legend**
+  * click **Finish**.
+
+
+
+![][11]
+
+And this is the result:
+
+![][12]
+
+If the red line appears without any value, select it, then right click > Format Data Series > Align Data Series to Secondary y-Axis > Click OK.
+
+#### Step 4: Fine tune the chart
+
+The range of the secondary y-axis is set to **0 – 120** , it needs to be up to **100**.
+
+Double click on the secondary y-axis . In the **Scale** tab, untick **Automatic** and **enter 100** as the maximum value. Then click ok.
+
+![][13]
+
+All done!
+
+![][14]
+
+**Conclusion**
+
+Using a Pareto chart to analyze problems in a business project allows focusing efforts towards the ones offering the most considerable improvement potential.
+
+This is one of the many real-life scenario where I have used LibreOffice instead of other proprietary office software. I hope to share more LibreOffice tutorials on It’s FOSS. Meanwhile, you can [learn these rather hidden LibreOffice tips][15].
+
+Which LibreOffice functionality do you use the most? Let us know at the comments below!
+
+--------------------------------------------------------------------------------
+
+via: https://itsfoss.com/pareto-chart-libreoffice/
+
+作者：[Dimitrios Savvopoulos][a]
+选题：[lujun9972][b]
+译者：[译者ID](https://github.com/译者ID)
+校对：[校对者ID](https://github.com/校对者ID)
+
+本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
+
+[a]: https://itsfoss.com/author/dimitrios/
+[b]: https://github.com/lujun9972
+[1]: https://betterexplained.com/articles/understanding-the-pareto-principle-the-8020-rule/
+[2]: https://en.wikipedia.org/wiki/Pareto_principle#In_economics
+[3]: https://en.wikipedia.org/wiki/Program_optimization#Bottlenecks
+[4]: https://www.libreoffice.org/
+[5]: https://i2.wp.com/itsfoss.com/wp-content/uploads/2020/07/pareto-libreoffice.png?ssl=1
+[6]: https://i0.wp.com/itsfoss.com/wp-content/uploads/2020/07/1.-sort-the-data.png?ssl=1
+[7]: https://i0.wp.com/itsfoss.com/wp-content/uploads/2020/07/2.-cumulative-percent.png?ssl=1
+[8]: https://i1.wp.com/itsfoss.com/wp-content/uploads/2020/07/3.chart_.png?ssl=1
+[9]: https://i1.wp.com/itsfoss.com/wp-content/uploads/2020/07/5.data-range.png?ssl=1
+[10]: https://i1.wp.com/itsfoss.com/wp-content/uploads/2020/07/6.data-series.png?fit=800%2C381&ssl=1
+[11]: https://i1.wp.com/itsfoss.com/wp-content/uploads/2020/07/7.chart-elements.png?fit=800%2C381&ssl=1
+[12]: https://i0.wp.com/itsfoss.com/wp-content/uploads/2020/07/8.Pareto-chart.png?ssl=1
+[13]: https://i0.wp.com/itsfoss.com/wp-content/uploads/2020/07/9.fine-tune.png?ssl=1
+[14]: https://i0.wp.com/itsfoss.com/wp-content/uploads/2020/07/10.final_.png?ssl=1
+[15]: https://itsfoss.com/libreoffice-tips/