55.24% is the change from 525 to 815
Calculation steps:
[( 815 - 525 ) ÷ 525] x 100 = 55.24%
Formula
Percentage change = [(815 - 525) / 525] x 100
Subtract the new number by the original number
815 - 525 = 290
290 ÷ 525 = 0.5523809523809524
0.5523809523809524 x 100 = 55.24%