-24.5% is the change from 853 to 644
Calculation steps:
[( 644 - 853 ) ÷ 853] x 100 = -24.5%
Formula
Percentage change = [(644 - 853) / 853] x 100
Subtract the new number by the original number
644 - 853 = -209
-209 ÷ 853 = -0.24501758499413834
-0.24501758499413834 x 100 = -24.5%