-9.95% is the change from 975 to 878
Calculation steps:
[( 878 - 975 ) ÷ 975] x 100 = -9.95%
Formula
Percentage change = [(878 - 975) / 975] x 100
Subtract the new number by the original number
878 - 975 = -97
-97 ÷ 975 = -0.09948717948717949
-0.09948717948717949 x 100 = -9.95%