53.68% is the change from 136 to 209
Calculation steps:
[( 209 - 136 ) ÷ 136] x 100 = 53.68%
Formula
Percentage change = [(209 - 136) / 136] x 100
Subtract the new number by the original number
209 - 136 = 73
73 ÷ 136 = 0.5367647058823529
0.5367647058823529 x 100 = 53.68%