-30% is the change from 470 to 329
Calculation steps:
[( 329 - 470 ) ÷ 470] x 100 = -30%
Formula
Percentage change = [(329 - 470) / 470] x 100
Subtract the new number by the original number
329 - 470 = -141
-141 ÷ 470 = -0.3
-0.3 x 100 = -30%
Example