40.76% is the change from 157 to 221
Calculation steps:
[( 221 - 157 ) ÷ 157] x 100 = 40.76%
Formula
Percentage change = [(221 - 157) / 157] x 100
Subtract the new number by the original number
221 - 157 = 64
64 ÷ 157 = 0.40764331210191085
0.40764331210191085 x 100 = 40.76%