-96.19% is the change from 420 to 16
Calculation steps:
[( 16 - 420 ) ÷ 420] x 100 = -96.19%
Formula
Percentage change = [(16 - 420) / 420] x 100
Subtract the new number by the original number
16 - 420 = -404
-404 ÷ 420 = -0.9619047619047619
-0.9619047619047619 x 100 = -96.19%