47.4% is the change from 557 to 821
Calculation steps:
[( 821 - 557 ) ÷ 557] x 100 = 47.4%
Formula
Percentage change = [(821 - 557) / 557] x 100
Subtract the new number by the original number
821 - 557 = 264
264 ÷ 557 = 0.473967684021544
0.473967684021544 x 100 = 47.4%