288.24% is the change from 170 to 660
Calculation steps:
[( 660 - 170 ) ÷ 170] x 100 = 288.24%
Formula
Percentage change = [(660 - 170) / 170] x 100
Subtract the new number by the original number
660 - 170 = 490
490 ÷ 170 = 2.8823529411764706
2.8823529411764706 x 100 = 288.24%