142.5% is the change from 120 to 291
Calculation steps:
[( 291 - 120 ) ÷ 120] x 100 = 142.5%
Formula
Percentage change = [(291 - 120) / 120] x 100
Subtract the new number by the original number
291 - 120 = 171
171 ÷ 120 = 1.425
1.425 x 100 = 142.5%
Example