-60% is the change from 310 to 124
Calculation steps:
[( 124 - 310 ) ÷ 310] x 100 = -60%
Formula
Percentage change = [(124 - 310) / 310] x 100
Subtract the new number by the original number
124 - 310 = -186
-186 ÷ 310 = -0.6
-0.6 x 100 = -60%
Example