67.25% is the change from 171 to 286
Calculation steps:
[( 286 - 171 ) ÷ 171] x 100 = 67.25%
Formula
Percentage change = [(286 - 171) / 171] x 100
Subtract the new number by the original number
286 - 171 = 115
115 ÷ 171 = 0.672514619883041
0.672514619883041 x 100 = 67.25%