-31.38% is the change from 478 to 328
Calculation steps:
[( 328 - 478 ) ÷ 478] x 100 = -31.38%
Formula
Percentage change = [(328 - 478) / 478] x 100
Subtract the new number by the original number
328 - 478 = -150
-150 ÷ 478 = -0.3138075313807531
-0.3138075313807531 x 100 = -31.38%