-49.04% is the change from 312 to 159
Calculation steps:
[( 159 - 312 ) ÷ 312] x 100 = -49.04%
Formula
Percentage change = [(159 - 312) / 312] x 100
Subtract the new number by the original number
159 - 312 = -153
-153 ÷ 312 = -0.49038461538461536
-0.49038461538461536 x 100 = -49.04%