-63.87% is the change from 858 to 310
Calculation steps:
[( 310 - 858 ) ÷ 858] x 100 = -63.87%
Formula
Percentage change = [(310 - 858) / 858] x 100
Subtract the new number by the original number
310 - 858 = -548
-548 ÷ 858 = -0.6386946386946387
-0.6386946386946387 x 100 = -63.87%