-19.37% is the change from 315 to 254
Calculation steps:
[( 254 - 315 ) ÷ 315] x 100 = -19.37%
Formula
Percentage change = [(254 - 315) / 315] x 100
Subtract the new number by the original number
254 - 315 = -61
-61 ÷ 315 = -0.19365079365079366
-0.19365079365079366 x 100 = -19.37%