-97.85% is the change from 837 to 18
Calculation steps:
[( 18 - 837 ) ÷ 837] x 100 = -97.85%
Formula
Percentage change = [(18 - 837) / 837] x 100
Subtract the new number by the original number
18 - 837 = -819
-819 ÷ 837 = -0.978494623655914
-0.978494623655914 x 100 = -97.85%