250% is the change from 42 to 147
Calculation steps:
[( 147 - 42 ) ÷ 42] x 100 = 250%
Formula
Percentage change = [(147 - 42) / 42] x 100
Subtract the new number by the original number
147 - 42 = 105
105 ÷ 42 = 2.5
2.5 x 100 = 250%
Example