-63.64% is the change from 880 to 320
Calculation steps:
[( 320 - 880 ) ÷ 880] x 100 = -63.64%
Formula
Percentage change = [(320 - 880) / 880] x 100
Subtract the new number by the original number
320 - 880 = -560
-560 ÷ 880 = -0.6363636363636364
-0.6363636363636364 x 100 = -63.64%