-3.03% is the change from 495 to 480
Calculation steps:
[( 480 - 495 ) ÷ 495] x 100 = -3.03%
Formula
Percentage change = [(480 - 495) / 495] x 100
Subtract the new number by the original number
480 - 495 = -15
-15 ÷ 495 = -0.030303030303030304
-0.030303030303030304 x 100 = -3.03%