-31.57% is the change from 947 to 648
Calculation steps:
[( 648 - 947 ) ÷ 947] x 100 = -31.57%
Formula
Percentage change = [(648 - 947) / 947] x 100
Subtract the new number by the original number
648 - 947 = -299
-299 ÷ 947 = -0.31573389651531153
-0.31573389651531153 x 100 = -31.57%