-66.13% is the change from 310 to 105
Calculation steps:
[( 105 - 310 ) ÷ 310] x 100 = -66.13%
Formula
Percentage change = [(105 - 310) / 310] x 100
Subtract the new number by the original number
105 - 310 = -205
-205 ÷ 310 = -0.6612903225806451
-0.6612903225806451 x 100 = -66.13%