-96.49% is the change from 598 to 21
Calculation steps:
[( 21 - 598 ) ÷ 598] x 100 = -96.49%
Formula
Percentage change = [(21 - 598) / 598] x 100
Subtract the new number by the original number
21 - 598 = -577
-577 ÷ 598 = -0.9648829431438127
-0.9648829431438127 x 100 = -96.49%