-28.9% is the change from 820 to 583
Calculation steps:
[( 583 - 820 ) ÷ 820] x 100 = -28.9%
Formula
Percentage change = [(583 - 820) / 820] x 100
Subtract the new number by the original number
583 - 820 = -237
-237 ÷ 820 = -0.2890243902439024
-0.2890243902439024 x 100 = -28.9%