-95.09% is the change from 428 to 21
Calculation steps:
[( 21 - 428 ) ÷ 428] x 100 = -95.09%
Formula
Percentage change = [(21 - 428) / 428] x 100
Subtract the new number by the original number
21 - 428 = -407
-407 ÷ 428 = -0.9509345794392523
-0.9509345794392523 x 100 = -95.09%