188.82% is the change from 170 to 491
Calculation steps:
[( 491 - 170 ) ÷ 170] x 100 = 188.82%
Formula
Percentage change = [(491 - 170) / 170] x 100
Subtract the new number by the original number
491 - 170 = 321
321 ÷ 170 = 1.888235294117647
1.888235294117647 x 100 = 188.82%