221.25% is the change from 80 to 257
Calculation steps:
[( 257 - 80 ) ÷ 80] x 100 = 221.25%
Formula
Percentage change = [(257 - 80) / 80] x 100
Subtract the new number by the original number
257 - 80 = 177
177 ÷ 80 = 2.2125
2.2125 x 100 = 221.25%
Example