487.65% is the change from 170 to 999
Calculation steps:
[( 999 - 170 ) ÷ 170] x 100 = 487.65%
Formula
Percentage change = [(999 - 170) / 170] x 100
Subtract the new number by the original number
999 - 170 = 829
829 ÷ 170 = 4.876470588235295
4.876470588235295 x 100 = 487.65%