68.82% is the change from 170 to 287
Calculation steps:
[( 287 - 170 ) ÷ 170] x 100 = 68.82%
Formula
Percentage change = [(287 - 170) / 170] x 100
Subtract the new number by the original number
287 - 170 = 117
117 ÷ 170 = 0.6882352941176471
0.6882352941176471 x 100 = 68.82%