-96% is the change from 400 to 16
Calculation steps:
[( 16 - 400 ) ÷ 400] x 100 = -96%
Formula
Percentage change = [(16 - 400) / 400] x 100
Subtract the new number by the original number
16 - 400 = -384
-384 ÷ 400 = -0.96
-0.96 x 100 = -96%
Example