-78.06% is the change from 310 to 68
Calculation steps:
[( 68 - 310 ) ÷ 310] x 100 = -78.06%
Formula
Percentage change = [(68 - 310) / 310] x 100
Subtract the new number by the original number
68 - 310 = -242
-242 ÷ 310 = -0.7806451612903226
-0.7806451612903226 x 100 = -78.06%