-99.4% is the change from 838 to 5
Calculation steps:
[( 5 - 838 ) ÷ 838] x 100 = -99.4%
Formula
Percentage change = [(5 - 838) / 838] x 100
Subtract the new number by the original number
5 - 838 = -833
-833 ÷ 838 = -0.9940334128878282
-0.9940334128878282 x 100 = -99.4%