-51.11% is the change from 315 to 154
Calculation steps:
[( 154 - 315 ) ÷ 315] x 100 = -51.11%
Formula
Percentage change = [(154 - 315) / 315] x 100
Subtract the new number by the original number
154 - 315 = -161
-161 ÷ 315 = -0.5111111111111111
-0.5111111111111111 x 100 = -51.11%