87.7% is the change from 512 to 961
Calculation steps:
[( 961 - 512 ) ÷ 512] x 100 = 87.7%
Formula
Percentage change = [(961 - 512) / 512] x 100
Subtract the new number by the original number
961 - 512 = 449
449 ÷ 512 = 0.876953125
0.876953125 x 100 = 87.7%