-63.13% is the change from 868 to 320
Calculation steps:
[( 320 - 868 ) ÷ 868] x 100 = -63.13%
Formula
Percentage change = [(320 - 868) / 868] x 100
Subtract the new number by the original number
320 - 868 = -548
-548 ÷ 868 = -0.631336405529954
-0.631336405529954 x 100 = -63.13%