-93.56% is the change from 326 to 21
Calculation steps:
[( 21 - 326 ) ÷ 326] x 100 = -93.56%
Formula
Percentage change = [(21 - 326) / 326] x 100
Subtract the new number by the original number
21 - 326 = -305
-305 ÷ 326 = -0.9355828220858896
-0.9355828220858896 x 100 = -93.56%