-52.56% is the change from 312 to 148
Calculation steps:
[( 148 - 312 ) ÷ 312] x 100 = -52.56%
Formula
Percentage change = [(148 - 312) / 312] x 100
Subtract the new number by the original number
148 - 312 = -164
-164 ÷ 312 = -0.5256410256410257
-0.5256410256410257 x 100 = -52.56%