-15.63% is the change from 480 to 405
Calculation steps:
[( 405 - 480 ) ÷ 480] x 100 = -15.63%
Formula
Percentage change = [(405 - 480) / 480] x 100
Subtract the new number by the original number
405 - 480 = -75
-75 ÷ 480 = -0.15625
-0.15625 x 100 = -15.63%