-32.31% is the change from 947 to 641
Calculation steps:
[( 641 - 947 ) ÷ 947] x 100 = -32.31%
Formula
Percentage change = [(641 - 947) / 947] x 100
Subtract the new number by the original number
641 - 947 = -306
-306 ÷ 947 = -0.32312565997888065
-0.32312565997888065 x 100 = -32.31%