-67.53% is the change from 970 to 315
Calculation steps:
[( 315 - 970 ) ÷ 970] x 100 = -67.53%
Formula
Percentage change = [(315 - 970) / 970] x 100
Subtract the new number by the original number
315 - 970 = -655
-655 ÷ 970 = -0.6752577319587629
-0.6752577319587629 x 100 = -67.53%