Original Income = 15,000
New income = 20,000
The percentage Increase in the income can be calculated as:
![(Change)/(Original) * 100](https://img.qammunity.org/2019/formulas/mathematics/college/21jyn6j1mu9cnit6s8bvmhfmk7dncuih63.png)
%
The change in income = 20000 - 15000 = 5000
Using the values, we get:
![(5000)/(15000)*100](https://img.qammunity.org/2019/formulas/mathematics/college/2ih9o5y1ufnyjnc9ra0h3msbatmmdsr615.png)
%
=
![33.33](https://img.qammunity.org/2019/formulas/mathematics/college/wv7mznu0g8qpegs0rufpp94fyxplbzgxxs.png)
%
This means, Pats income increased by 33.33% in a period of ten years