-24.04% is the change from 337 to 256
Calculation steps:
[( 256 - 337 ) ÷ 337] x 100 = -24.04%
Formula
Percentage change = [(256 - 337) / 337] x 100
Subtract the new number by the original number
256 - 337 = -81
-81 ÷ 337 = -0.2403560830860534
-0.2403560830860534 x 100 = -24.04%