-7.84% is the change from 931 to 858
Calculation steps:
[( 858 - 931 ) ÷ 931] x 100 = -7.84%
Formula
Percentage change = [(858 - 931) / 931] x 100
Subtract the new number by the original number
858 - 931 = -73
-73 ÷ 931 = -0.07841031149301826
-0.07841031149301826 x 100 = -7.84%