64.31% is the change from 339 to 557
Calculation steps:
[( 557 - 339 ) ÷ 339] x 100 = 64.31%
Formula
Percentage change = [(557 - 339) / 339] x 100
Subtract the new number by the original number
557 - 339 = 218
218 ÷ 339 = 0.6430678466076696
0.6430678466076696 x 100 = 64.31%