-96.83% is the change from 315 to 10
Calculation steps:
[( 10 - 315 ) ÷ 315] x 100 = -96.83%
Formula
Percentage change = [(10 - 315) / 315] x 100
Subtract the new number by the original number
10 - 315 = -305
-305 ÷ 315 = -0.9682539682539683
-0.9682539682539683 x 100 = -96.83%