-62.92% is the change from 863 to 320
Calculation steps:
[( 320 - 863 ) ÷ 863] x 100 = -62.92%
Formula
Percentage change = [(320 - 863) / 863] x 100
Subtract the new number by the original number
320 - 863 = -543
-543 ÷ 863 = -0.6292004634994206
-0.6292004634994206 x 100 = -62.92%