-6.88% is the change from 480 to 447
Calculation steps:
[( 447 - 480 ) ÷ 480] x 100 = -6.88%
Formula
Percentage change = [(447 - 480) / 480] x 100
Subtract the new number by the original number
447 - 480 = -33
-33 ÷ 480 = -0.06875
-0.06875 x 100 = -6.88%