377.5% is the change from 40 to 191
Calculation steps:
[( 191 - 40 ) ÷ 40] x 100 = 377.5%
Formula
Percentage change = [(191 - 40) / 40] x 100
Subtract the new number by the original number
191 - 40 = 151
151 ÷ 40 = 3.775
3.775 x 100 = 377.5%
Example