-72.97% is the change from 947 to 256
Calculation steps:
[( 256 - 947 ) ÷ 947] x 100 = -72.97%
Formula
Percentage change = [(256 - 947) / 947] x 100
Subtract the new number by the original number
256 - 947 = -691
-691 ÷ 947 = -0.7296726504751848
-0.7296726504751848 x 100 = -72.97%