990% is the change from 80 to 872
Calculation steps:
[( 872 - 80 ) ÷ 80] x 100 = 990%
Formula
Percentage change = [(872 - 80) / 80] x 100
Subtract the new number by the original number
872 - 80 = 792
792 ÷ 80 = 9.9
9.9 x 100 = 990%
Example