-83.93% is the change from 616 to 99
Calculation steps:
[( 99 - 616 ) ÷ 616] x 100 = -83.93%
Formula
Percentage change = [(99 - 616) / 616] x 100
Subtract the new number by the original number
99 - 616 = -517
-517 ÷ 616 = -0.8392857142857143
-0.8392857142857143 x 100 = -83.93%