-27.32% is the change from 853 to 620
Calculation steps:
[( 620 - 853 ) ÷ 853] x 100 = -27.32%
Formula
Percentage change = [(620 - 853) / 853] x 100
Subtract the new number by the original number
620 - 853 = -233
-233 ÷ 853 = -0.2731535756154748
-0.2731535756154748 x 100 = -27.32%