-55.45% is the change from 312 to 139
Calculation steps:
[( 139 - 312 ) ÷ 312] x 100 = -55.45%
Formula
Percentage change = [(139 - 312) / 312] x 100
Subtract the new number by the original number
139 - 312 = -173
-173 ÷ 312 = -0.5544871794871795
-0.5544871794871795 x 100 = -55.45%