-83.25% is the change from 949 to 159
Calculation steps:
[( 159 - 949 ) ÷ 949] x 100 = -83.25%
Formula
Percentage change = [(159 - 949) / 949] x 100
Subtract the new number by the original number
159 - 949 = -790
-790 ÷ 949 = -0.8324552160168599
-0.8324552160168599 x 100 = -83.25%