63.82% is the change from 340 to 557
Calculation steps:
[( 557 - 340 ) ÷ 340] x 100 = 63.82%
Formula
Percentage change = [(557 - 340) / 340] x 100
Subtract the new number by the original number
557 - 340 = 217
217 ÷ 340 = 0.638235294117647
0.638235294117647 x 100 = 63.82%