-97.84% is the change from 835 to 18
Calculation steps:
[( 18 - 835 ) ÷ 835] x 100 = -97.84%
Formula
Percentage change = [(18 - 835) / 835] x 100
Subtract the new number by the original number
18 - 835 = -817
-817 ÷ 835 = -0.9784431137724551
-0.9784431137724551 x 100 = -97.84%