64.5% is the change from 338 to 556
Calculation steps:
[( 556 - 338 ) ÷ 338] x 100 = 64.5%
Formula
Percentage change = [(556 - 338) / 338] x 100
Subtract the new number by the original number
556 - 338 = 218
218 ÷ 338 = 0.6449704142011834
0.6449704142011834 x 100 = 64.5%