-50.97% is the change from 310 to 152
Calculation steps:
[( 152 - 310 ) ÷ 310] x 100 = -50.97%
Formula
Percentage change = [(152 - 310) / 310] x 100
Subtract the new number by the original number
152 - 310 = -158
-158 ÷ 310 = -0.5096774193548387
-0.5096774193548387 x 100 = -50.97%