-29.67% is the change from 947 to 666
Calculation steps:
[( 666 - 947 ) ÷ 947] x 100 = -29.67%
Formula
Percentage change = [(666 - 947) / 947] x 100
Subtract the new number by the original number
666 - 947 = -281
-281 ÷ 947 = -0.2967265047518479
-0.2967265047518479 x 100 = -29.67%