-7.15% is the change from 923 to 857
Calculation steps:
[( 857 - 923 ) ÷ 923] x 100 = -7.15%
Formula
Percentage change = [(857 - 923) / 923] x 100
Subtract the new number by the original number
857 - 923 = -66
-66 ÷ 923 = -0.07150595882990249
-0.07150595882990249 x 100 = -7.15%