-81.84% is the change from 947 to 172
Calculation steps:
[( 172 - 947 ) ÷ 947] x 100 = -81.84%
Formula
Percentage change = [(172 - 947) / 947] x 100
Subtract the new number by the original number
172 - 947 = -775
-775 ÷ 947 = -0.8183738120380147
-0.8183738120380147 x 100 = -81.84%