52.6% is the change from 538 to 821
Calculation steps:
[( 821 - 538 ) ÷ 538] x 100 = 52.6%
Formula
Percentage change = [(821 - 538) / 538] x 100
Subtract the new number by the original number
821 - 538 = 283
283 ÷ 538 = 0.5260223048327137
0.5260223048327137 x 100 = 52.6%