-50% is the change from 774 to 387
Calculation steps:
[( 387 - 774 ) ÷ 774] x 100 = -50%
Formula
Percentage change = [(387 - 774) / 774] x 100
Subtract the new number by the original number
387 - 774 = -387
-387 ÷ 774 = -0.5
-0.5 x 100 = -50%
Example