76.29% is the change from 97 to 171
Calculation steps:
[( 171 - 97 ) ÷ 97] x 100 = 76.29%
Formula
Percentage change = [(171 - 97) / 97] x 100
Subtract the new number by the original number
171 - 97 = 74
74 ÷ 97 = 0.7628865979381443
0.7628865979381443 x 100 = 76.29%