-50.8% is the change from 311 to 153
Calculation steps:
[( 153 - 311 ) ÷ 311] x 100 = -50.8%
Formula
Percentage change = [(153 - 311) / 311] x 100
Subtract the new number by the original number
153 - 311 = -158
-158 ÷ 311 = -0.5080385852090032
-0.5080385852090032 x 100 = -50.8%