-97.13% is the change from 628 to 18
Calculation steps:
[( 18 - 628 ) ÷ 628] x 100 = -97.13%
Formula
Percentage change = [(18 - 628) / 628] x 100
Subtract the new number by the original number
18 - 628 = -610
-610 ÷ 628 = -0.9713375796178344
-0.9713375796178344 x 100 = -97.13%