886.87% is the change from 99 to 977
Calculation steps:
[( 977 - 99 ) ÷ 99] x 100 = 886.87%
Formula
Percentage change = [(977 - 99) / 99] x 100
Subtract the new number by the original number
977 - 99 = 878
878 ÷ 99 = 8.868686868686869
8.868686868686869 x 100 = 886.87%