81.18% is the change from 287 to 520
Calculation steps:
[( 520 - 287 ) ÷ 287] x 100 = 81.18%
Formula
Percentage change = [(520 - 287) / 287] x 100
Subtract the new number by the original number
520 - 287 = 233
233 ÷ 287 = 0.8118466898954704
0.8118466898954704 x 100 = 81.18%