-96.43% is the change from 588 to 21
Calculation steps:
[( 21 - 588 ) ÷ 588] x 100 = -96.43%
Formula
Percentage change = [(21 - 588) / 588] x 100
Subtract the new number by the original number
21 - 588 = -567
-567 ÷ 588 = -0.9642857142857143
-0.9642857142857143 x 100 = -96.43%