25.9% is the change from 525 to 661
Calculation steps:
[( 661 - 525 ) ÷ 525] x 100 = 25.9%
Formula
Percentage change = [(661 - 525) / 525] x 100
Subtract the new number by the original number
661 - 525 = 136
136 ÷ 525 = 0.259047619047619
0.259047619047619 x 100 = 25.9%