-64.33% is the change from 897 to 320
Calculation steps:
[( 320 - 897 ) ÷ 897] x 100 = -64.33%
Formula
Percentage change = [(320 - 897) / 897] x 100
Subtract the new number by the original number
320 - 897 = -577
-577 ÷ 897 = -0.6432552954292085
-0.6432552954292085 x 100 = -64.33%