-97.9% is the change from 619 to 13
Calculation steps:
[( 13 - 619 ) ÷ 619] x 100 = -97.9%
Formula
Percentage change = [(13 - 619) / 619] x 100
Subtract the new number by the original number
13 - 619 = -606
-606 ÷ 619 = -0.9789983844911146
-0.9789983844911146 x 100 = -97.9%