-83.21% is the change from 947 to 159
Calculation steps:
[( 159 - 947 ) ÷ 947] x 100 = -83.21%
Formula
Percentage change = [(159 - 947) / 947] x 100
Subtract the new number by the original number
159 - 947 = -788
-788 ÷ 947 = -0.8321013727560718
-0.8321013727560718 x 100 = -83.21%