-52.7% is the change from 315 to 149
Calculation steps:
[( 149 - 315 ) ÷ 315] x 100 = -52.7%
Formula
Percentage change = [(149 - 315) / 315] x 100
Subtract the new number by the original number
149 - 315 = -166
-166 ÷ 315 = -0.526984126984127
-0.526984126984127 x 100 = -52.7%