-22.19% is the change from 329 to 256
Calculation steps:
[( 256 - 329 ) ÷ 329] x 100 = -22.19%
Formula
Percentage change = [(256 - 329) / 329] x 100
Subtract the new number by the original number
256 - 329 = -73
-73 ÷ 329 = -0.22188449848024316
-0.22188449848024316 x 100 = -22.19%