-30.21% is the change from 470 to 328
Calculation steps:
[( 328 - 470 ) ÷ 470] x 100 = -30.21%
Formula
Percentage change = [(328 - 470) / 470] x 100
Subtract the new number by the original number
328 - 470 = -142
-142 ÷ 470 = -0.3021276595744681
-0.3021276595744681 x 100 = -30.21%