82.81% is the change from 285 to 521
Calculation steps:
[( 521 - 285 ) ÷ 285] x 100 = 82.81%
Formula
Percentage change = [(521 - 285) / 285] x 100
Subtract the new number by the original number
521 - 285 = 236
236 ÷ 285 = 0.8280701754385965
0.8280701754385965 x 100 = 82.81%