20.93% is the change from 430 to 520
Calculation steps:
[( 520 - 430 ) ÷ 430] x 100 = 20.93%
Formula
Percentage change = [(520 - 430) / 430] x 100
Subtract the new number by the original number
520 - 430 = 90
90 ÷ 430 = 0.20930232558139536
0.20930232558139536 x 100 = 20.93%