-9.48% is the change from 970 to 878
Calculation steps:
[( 878 - 970 ) ÷ 970] x 100 = -9.48%
Formula
Percentage change = [(878 - 970) / 970] x 100
Subtract the new number by the original number
878 - 970 = -92
-92 ÷ 970 = -0.09484536082474226
-0.09484536082474226 x 100 = -9.48%