-9.59% is the change from 970 to 877
Calculation steps:
[( 877 - 970 ) ÷ 970] x 100 = -9.59%
Formula
Percentage change = [(877 - 970) / 970] x 100
Subtract the new number by the original number
877 - 970 = -93
-93 ÷ 970 = -0.09587628865979382
-0.09587628865979382 x 100 = -9.59%