-64.04% is the change from 890 to 320
Calculation steps:
[( 320 - 890 ) ÷ 890] x 100 = -64.04%
Formula
Percentage change = [(320 - 890) / 890] x 100
Subtract the new number by the original number
320 - 890 = -570
-570 ÷ 890 = -0.6404494382022472
-0.6404494382022472 x 100 = -64.04%