82.94% is the change from 170 to 311
Calculation steps:
[( 311 - 170 ) ÷ 170] x 100 = 82.94%
Formula
Percentage change = [(311 - 170) / 170] x 100
Subtract the new number by the original number
311 - 170 = 141
141 ÷ 170 = 0.8294117647058824
0.8294117647058824 x 100 = 82.94%