51.76% is the change from 170 to 258
Calculation steps:
[( 258 - 170 ) ÷ 170] x 100 = 51.76%
Formula
Percentage change = [(258 - 170) / 170] x 100
Subtract the new number by the original number
258 - 170 = 88
88 ÷ 170 = 0.5176470588235295
0.5176470588235295 x 100 = 51.76%