-95.15% is the change from 619 to 30
Calculation steps:
[( 30 - 619 ) ÷ 619] x 100 = -95.15%
Formula
Percentage change = [(30 - 619) / 619] x 100
Subtract the new number by the original number
30 - 619 = -589
-589 ÷ 619 = -0.9515347334410339
-0.9515347334410339 x 100 = -95.15%