113.75% is the change from 80 to 171
Calculation steps:
[( 171 - 80 ) ÷ 80] x 100 = 113.75%
Formula
Percentage change = [(171 - 80) / 80] x 100
Subtract the new number by the original number
171 - 80 = 91
91 ÷ 80 = 1.1375
1.1375 x 100 = 113.75%
Example