85.03% is the change from 521 to 964
Calculation steps:
[( 964 - 521 ) ÷ 521] x 100 = 85.03%
Formula
Percentage change = [(964 - 521) / 521] x 100
Subtract the new number by the original number
964 - 521 = 443
443 ÷ 521 = 0.8502879078694817
0.8502879078694817 x 100 = 85.03%