-97.89% is the change from 853 to 18
Calculation steps:
[( 18 - 853 ) ÷ 853] x 100 = -97.89%
Formula
Percentage change = [(18 - 853) / 853] x 100
Subtract the new number by the original number
18 - 853 = -835
-835 ÷ 853 = -0.9788980070339977
-0.9788980070339977 x 100 = -97.89%