-66.74% is the change from 947 to 315
Calculation steps:
[( 315 - 947 ) ÷ 947] x 100 = -66.74%
Formula
Percentage change = [(315 - 947) / 947] x 100
Subtract the new number by the original number
315 - 947 = -632
-632 ÷ 947 = -0.6673706441393875
-0.6673706441393875 x 100 = -66.74%