-56.09% is the change from 312 to 137
Calculation steps:
[( 137 - 312 ) ÷ 312] x 100 = -56.09%
Formula
Percentage change = [(137 - 312) / 312] x 100
Subtract the new number by the original number
137 - 312 = -175
-175 ÷ 312 = -0.5608974358974359
-0.5608974358974359 x 100 = -56.09%