90% is the change from 280 to 532
Calculation steps:
[( 532 - 280 ) ÷ 280] x 100 = 90%
Formula
Percentage change = [(532 - 280) / 280] x 100
Subtract the new number by the original number
532 - 280 = 252
252 ÷ 280 = 0.9
0.9 x 100 = 90%
Example