85.41% is the change from 281 to 521
Calculation steps:
[( 521 - 281 ) ÷ 281] x 100 = 85.41%
Formula
Percentage change = [(521 - 281) / 281] x 100
Subtract the new number by the original number
521 - 281 = 240
240 ÷ 281 = 0.8540925266903915
0.8540925266903915 x 100 = 85.41%