50.36% is the change from 137 to 206
Calculation steps:
[( 206 - 137 ) ÷ 137] x 100 = 50.36%
Formula
Percentage change = [(206 - 137) / 137] x 100
Subtract the new number by the original number
206 - 137 = 69
69 ÷ 137 = 0.5036496350364964
0.5036496350364964 x 100 = 50.36%