-95.32% is the change from 449 to 21
Calculation steps:
[( 21 - 449 ) ÷ 449] x 100 = -95.32%
Formula
Percentage change = [(21 - 449) / 449] x 100
Subtract the new number by the original number
21 - 449 = -428
-428 ÷ 449 = -0.9532293986636972
-0.9532293986636972 x 100 = -95.32%