280% is the change from 40 to 152
Calculation steps:
[( 152 - 40 ) ÷ 40] x 100 = 280%
Formula
Percentage change = [(152 - 40) / 40] x 100
Subtract the new number by the original number
152 - 40 = 112
112 ÷ 40 = 2.8
2.8 x 100 = 280%
Example