52.55% is the change from 137 to 209
Calculation steps:
[( 209 - 137 ) ÷ 137] x 100 = 52.55%
Formula
Percentage change = [(209 - 137) / 137] x 100
Subtract the new number by the original number
209 - 137 = 72
72 ÷ 137 = 0.5255474452554745
0.5255474452554745 x 100 = 52.55%