52.17% is the change from 207 to 315
Calculation steps:
[( 315 - 207 ) ÷ 207] x 100 = 52.17%
Formula
Percentage change = [(315 - 207) / 207] x 100
Subtract the new number by the original number
315 - 207 = 108
108 ÷ 207 = 0.5217391304347826
0.5217391304347826 x 100 = 52.17%