478.95% is the change from 171 to 990
Calculation steps:
[( 990 - 171 ) ÷ 171] x 100 = 478.95%
Formula
Percentage change = [(990 - 171) / 171] x 100
Subtract the new number by the original number
990 - 171 = 819
819 ÷ 171 = 4.7894736842105265
4.7894736842105265 x 100 = 478.95%