290% is the change from 40 to 156
Calculation steps:
[( 156 - 40 ) ÷ 40] x 100 = 290%
Formula
Percentage change = [(156 - 40) / 40] x 100
Subtract the new number by the original number
156 - 40 = 116
116 ÷ 40 = 2.9
2.9 x 100 = 290%
Example