-96.54% is the change from 607 to 21
Calculation steps:
[( 21 - 607 ) ÷ 607] x 100 = -96.54%
Formula
Percentage change = [(21 - 607) / 607] x 100
Subtract the new number by the original number
21 - 607 = -586
-586 ÷ 607 = -0.9654036243822076
-0.9654036243822076 x 100 = -96.54%