-84.25% is the change from 400 to 63
Calculation steps:
[( 63 - 400 ) ÷ 400] x 100 = -84.25%
Formula
Percentage change = [(63 - 400) / 400] x 100
Subtract the new number by the original number
63 - 400 = -337
-337 ÷ 400 = -0.8425
-0.8425 x 100 = -84.25%