-9.5% is the change from 947 to 857
Calculation steps:
[( 857 - 947 ) ÷ 947] x 100 = -9.5%
Formula
Percentage change = [(857 - 947) / 947] x 100
Subtract the new number by the original number
857 - 947 = -90
-90 ÷ 947 = -0.09503695881731784
-0.09503695881731784 x 100 = -9.5%