-96.45% is the change from 592 to 21
Calculation steps:
[( 21 - 592 ) ÷ 592] x 100 = -96.45%
Formula
Percentage change = [(21 - 592) / 592] x 100
Subtract the new number by the original number
21 - 592 = -571
-571 ÷ 592 = -0.964527027027027
-0.964527027027027 x 100 = -96.45%