-75.24% is the change from 315 to 78
Calculation steps:
[( 78 - 315 ) ÷ 315] x 100 = -75.24%
Formula
Percentage change = [(78 - 315) / 315] x 100
Subtract the new number by the original number
78 - 315 = -237
-237 ÷ 315 = -0.7523809523809524
-0.7523809523809524 x 100 = -75.24%