88.02% is the change from 509 to 957
Calculation steps:
[( 957 - 509 ) ÷ 509] x 100 = 88.02%
Formula
Percentage change = [(957 - 509) / 509] x 100
Subtract the new number by the original number
957 - 509 = 448
448 ÷ 509 = 0.8801571709233792
0.8801571709233792 x 100 = 88.02%