-96.51% is the change from 602 to 21
Calculation steps:
[( 21 - 602 ) ÷ 602] x 100 = -96.51%
Formula
Percentage change = [(21 - 602) / 602] x 100
Subtract the new number by the original number
21 - 602 = -581
-581 ÷ 602 = -0.9651162790697675
-0.9651162790697675 x 100 = -96.51%