870.59% is the change from 102 to 990
Calculation steps:
[( 990 - 102 ) ÷ 102] x 100 = 870.59%
Formula
Percentage change = [(990 - 102) / 102] x 100
Subtract the new number by the original number
990 - 102 = 888
888 ÷ 102 = 8.705882352941176
8.705882352941176 x 100 = 870.59%