-81.25% is the change from 336 to 63
Calculation steps:
[( 63 - 336 ) ÷ 336] x 100 = -81.25%
Formula
Percentage change = [(63 - 336) / 336] x 100
Subtract the new number by the original number
63 - 336 = -273
-273 ÷ 336 = -0.8125
-0.8125 x 100 = -81.25%