-97.38% is the change from 687 to 18
Calculation steps:
[( 18 - 687 ) ÷ 687] x 100 = -97.38%
Formula
Percentage change = [(18 - 687) / 687] x 100
Subtract the new number by the original number
18 - 687 = -669
-669 ÷ 687 = -0.9737991266375546
-0.9737991266375546 x 100 = -97.38%