-50% is the change from 768 to 384
Calculation steps:
[( 384 - 768 ) ÷ 768] x 100 = -50%
Formula
Percentage change = [(384 - 768) / 768] x 100
Subtract the new number by the original number
384 - 768 = -384
-384 ÷ 768 = -0.5
-0.5 x 100 = -50%
Example