-97.85% is the change from 836 to 18
Calculation steps:
[( 18 - 836 ) ÷ 836] x 100 = -97.85%
Formula
Percentage change = [(18 - 836) / 836] x 100
Subtract the new number by the original number
18 - 836 = -818
-818 ÷ 836 = -0.9784688995215312
-0.9784688995215312 x 100 = -97.85%