-93.05% is the change from 302 to 21
Calculation steps:
[( 21 - 302 ) ÷ 302] x 100 = -93.05%
Formula
Percentage change = [(21 - 302) / 302] x 100
Subtract the new number by the original number
21 - 302 = -281
-281 ÷ 302 = -0.9304635761589404
-0.9304635761589404 x 100 = -93.05%