-30.48% is the change from 315 to 219
Calculation steps:
[( 219 - 315 ) ÷ 315] x 100 = -30.48%
Formula
Percentage change = [(219 - 315) / 315] x 100
Subtract the new number by the original number
219 - 315 = -96
-96 ÷ 315 = -0.3047619047619048
-0.3047619047619048 x 100 = -30.48%