-10.24% is the change from 977 to 877
Calculation steps:
[( 877 - 977 ) ÷ 977] x 100 = -10.24%
Formula
Percentage change = [(877 - 977) / 977] x 100
Subtract the new number by the original number
877 - 977 = -100
-100 ÷ 977 = -0.1023541453428864
-0.1023541453428864 x 100 = -10.24%