-29.46% is the change from 947 to 668
Calculation steps:
[( 668 - 947 ) ÷ 947] x 100 = -29.46%
Formula
Percentage change = [(668 - 947) / 947] x 100
Subtract the new number by the original number
668 - 947 = -279
-279 ÷ 947 = -0.2946145723336853
-0.2946145723336853 x 100 = -29.46%