997.5% is the change from 80 to 878
Calculation steps:
[( 878 - 80 ) ÷ 80] x 100 = 997.5%
Formula
Percentage change = [(878 - 80) / 80] x 100
Subtract the new number by the original number
878 - 80 = 798
798 ÷ 80 = 9.975
9.975 x 100 = 997.5%
Example