86.32% is the change from 285 to 531
Calculation steps:
[( 531 - 285 ) ÷ 285] x 100 = 86.32%
Formula
Percentage change = [(531 - 285) / 285] x 100
Subtract the new number by the original number
531 - 285 = 246
246 ÷ 285 = 0.8631578947368421
0.8631578947368421 x 100 = 86.32%