39.65% is the change from 512 to 715
Calculation steps:
[( 715 - 512 ) ÷ 512] x 100 = 39.65%
Formula
Percentage change = [(715 - 512) / 512] x 100
Subtract the new number by the original number
715 - 512 = 203
203 ÷ 512 = 0.396484375
0.396484375 x 100 = 39.65%