-32.85% is the change from 478 to 321
Calculation steps:
[( 321 - 478 ) ÷ 478] x 100 = -32.85%
Formula
Percentage change = [(321 - 478) / 478] x 100
Subtract the new number by the original number
321 - 478 = -157
-157 ÷ 478 = -0.3284518828451883
-0.3284518828451883 x 100 = -32.85%