-38.9% is the change from 419 to 256
Calculation steps:
[( 256 - 419 ) ÷ 419] x 100 = -38.9%
Formula
Percentage change = [(256 - 419) / 419] x 100
Subtract the new number by the original number
256 - 419 = -163
-163 ÷ 419 = -0.38902147971360385
-0.38902147971360385 x 100 = -38.9%