309.9% is the change from 202 to 828
Calculation steps:
[( 828 - 202 ) ÷ 202] x 100 = 309.9%
Formula
Percentage change = [(828 - 202) / 202] x 100
Subtract the new number by the original number
828 - 202 = 626
626 ÷ 202 = 3.099009900990099
3.099009900990099 x 100 = 309.9%