-85.4% is the change from 315 to 46
Calculation steps:
[( 46 - 315 ) ÷ 315] x 100 = -85.4%
Formula
Percentage change = [(46 - 315) / 315] x 100
Subtract the new number by the original number
46 - 315 = -269
-269 ÷ 315 = -0.8539682539682539
-0.8539682539682539 x 100 = -85.4%