-88.39% is the change from 853 to 99
Calculation steps:
[( 99 - 853 ) ÷ 853] x 100 = -88.39%
Formula
Percentage change = [(99 - 853) / 853] x 100
Subtract the new number by the original number
99 - 853 = -754
-754 ÷ 853 = -0.8839390386869871
-0.8839390386869871 x 100 = -88.39%