-50.8% is the change from 313 to 154
Calculation steps:
[( 154 - 313 ) ÷ 313] x 100 = -50.8%
Formula
Percentage change = [(154 - 313) / 313] x 100
Subtract the new number by the original number
154 - 313 = -159
-159 ÷ 313 = -0.5079872204472844
-0.5079872204472844 x 100 = -50.8%