-21.59% is the change from 315 to 247
Calculation steps:
[( 247 - 315 ) ÷ 315] x 100 = -21.59%
Formula
Percentage change = [(247 - 315) / 315] x 100
Subtract the new number by the original number
247 - 315 = -68
-68 ÷ 315 = -0.21587301587301588
-0.21587301587301588 x 100 = -21.59%