-63.49% is the change from 315 to 115
Calculation steps:
[( 115 - 315 ) ÷ 315] x 100 = -63.49%
Formula
Percentage change = [(115 - 315) / 315] x 100
Subtract the new number by the original number
115 - 315 = -200
-200 ÷ 315 = -0.6349206349206349
-0.6349206349206349 x 100 = -63.49%