-97.09% is the change from 619 to 18
Calculation steps:
[( 18 - 619 ) ÷ 619] x 100 = -97.09%
Formula
Percentage change = [(18 - 619) / 619] x 100
Subtract the new number by the original number
18 - 619 = -601
-601 ÷ 619 = -0.9709208400646203
-0.9709208400646203 x 100 = -97.09%