137.5% is the change from 88 to 209
Calculation steps:
[( 209 - 88 ) ÷ 88] x 100 = 137.5%
Formula
Percentage change = [(209 - 88) / 88] x 100
Subtract the new number by the original number
209 - 88 = 121
121 ÷ 88 = 1.375
1.375 x 100 = 137.5%
Example