422.5% is the change from 40 to 209
Calculation steps:
[( 209 - 40 ) ÷ 40] x 100 = 422.5%
Formula
Percentage change = [(209 - 40) / 40] x 100
Subtract the new number by the original number
209 - 40 = 169
169 ÷ 40 = 4.225
4.225 x 100 = 422.5%
Example