-49.2% is the change from 313 to 159
Calculation steps:
[( 159 - 313 ) ÷ 313] x 100 = -49.2%
Formula
Percentage change = [(159 - 313) / 313] x 100
Subtract the new number by the original number
159 - 313 = -154
-154 ÷ 313 = -0.49201277955271566
-0.49201277955271566 x 100 = -49.2%