-33.85% is the change from 387 to 256
Calculation steps:
[( 256 - 387 ) ÷ 387] x 100 = -33.85%
Formula
Percentage change = [(256 - 387) / 387] x 100
Subtract the new number by the original number
256 - 387 = -131
-131 ÷ 387 = -0.3385012919896641
-0.3385012919896641 x 100 = -33.85%