-51.61% is the change from 310 to 150
Calculation steps:
[( 150 - 310 ) ÷ 310] x 100 = -51.61%
Formula
Percentage change = [(150 - 310) / 310] x 100
Subtract the new number by the original number
150 - 310 = -160
-160 ÷ 310 = -0.5161290322580645
-0.5161290322580645 x 100 = -51.61%