82.17% is the change from 286 to 521
Calculation steps:
[( 521 - 286 ) ÷ 286] x 100 = 82.17%
Formula
Percentage change = [(521 - 286) / 286] x 100
Subtract the new number by the original number
521 - 286 = 235
235 ÷ 286 = 0.8216783216783217
0.8216783216783217 x 100 = 82.17%