-97.87% is the change from 847 to 18
Calculation steps:
[( 18 - 847 ) ÷ 847] x 100 = -97.87%
Formula
Percentage change = [(18 - 847) / 847] x 100
Subtract the new number by the original number
18 - 847 = -829
-829 ÷ 847 = -0.9787485242030697
-0.9787485242030697 x 100 = -97.87%