171.25% is the change from 80 to 217
Calculation steps:
[( 217 - 80 ) ÷ 80] x 100 = 171.25%
Formula
Percentage change = [(217 - 80) / 80] x 100
Subtract the new number by the original number
217 - 80 = 137
137 ÷ 80 = 1.7125
1.7125 x 100 = 171.25%
Example