12.88% is the change from 877 to 990
Calculation steps:
[( 990 - 877 ) ÷ 877] x 100 = 12.88%
Formula
Percentage change = [(990 - 877) / 877] x 100
Subtract the new number by the original number
990 - 877 = 113
113 ÷ 877 = 0.12884834663625996
0.12884834663625996 x 100 = 12.88%