-93.09% is the change from 304 to 21
Calculation steps:
[( 21 - 304 ) ÷ 304] x 100 = -93.09%
Formula
Percentage change = [(21 - 304) / 304] x 100
Subtract the new number by the original number
21 - 304 = -283
-283 ÷ 304 = -0.930921052631579
-0.930921052631579 x 100 = -93.09%