121.25% is the change from 80 to 177
Calculation steps:
[( 177 - 80 ) ÷ 80] x 100 = 121.25%
Formula
Percentage change = [(177 - 80) / 80] x 100
Subtract the new number by the original number
177 - 80 = 97
97 ÷ 80 = 1.2125
1.2125 x 100 = 121.25%
Example