-30.74% is the change from 462 to 320
Calculation steps:
[( 320 - 462 ) ÷ 462] x 100 = -30.74%
Formula
Percentage change = [(320 - 462) / 462] x 100
Subtract the new number by the original number
320 - 462 = -142
-142 ÷ 462 = -0.30735930735930733
-0.30735930735930733 x 100 = -30.74%