64.71% is the change from 340 to 560
Calculation steps:
[( 560 - 340 ) ÷ 340] x 100 = 64.71%
Formula
Percentage change = [(560 - 340) / 340] x 100
Subtract the new number by the original number
560 - 340 = 220
220 ÷ 340 = 0.6470588235294118
0.6470588235294118 x 100 = 64.71%