-96.94% is the change from 621 to 19
Calculation steps:
[( 19 - 621 ) ÷ 621] x 100 = -96.94%
Formula
Percentage change = [(19 - 621) / 621] x 100
Subtract the new number by the original number
19 - 621 = -602
-602 ÷ 621 = -0.9694041867954911
-0.9694041867954911 x 100 = -96.94%