-99.3% is the change from 853 to 6
Calculation steps:
[( 6 - 853 ) ÷ 853] x 100 = -99.3%
Formula
Percentage change = [(6 - 853) / 853] x 100
Subtract the new number by the original number
6 - 853 = -847
-847 ÷ 853 = -0.9929660023446659
-0.9929660023446659 x 100 = -99.3%