31.21% is the change from 157 to 206
Calculation steps:
[( 206 - 157 ) ÷ 157] x 100 = 31.21%
Formula
Percentage change = [(206 - 157) / 157] x 100
Subtract the new number by the original number
206 - 157 = 49
49 ÷ 157 = 0.31210191082802546
0.31210191082802546 x 100 = 31.21%