-64.29% is the change from 868 to 310
Calculation steps:
[( 310 - 868 ) ÷ 868] x 100 = -64.29%
Formula
Percentage change = [(310 - 868) / 868] x 100
Subtract the new number by the original number
310 - 868 = -558
-558 ÷ 868 = -0.6428571428571429
-0.6428571428571429 x 100 = -64.29%