-6.1% is the change from 935 to 878
Calculation steps:
[( 878 - 935 ) ÷ 935] x 100 = -6.1%
Formula
Percentage change = [(878 - 935) / 935] x 100
Subtract the new number by the original number
878 - 935 = -57
-57 ÷ 935 = -0.06096256684491978
-0.06096256684491978 x 100 = -6.1%