-71.25% is the change from 480 to 138
Calculation steps:
[( 138 - 480 ) ÷ 480] x 100 = -71.25%
Formula
Percentage change = [(138 - 480) / 480] x 100
Subtract the new number by the original number
138 - 480 = -342
-342 ÷ 480 = -0.7125
-0.7125 x 100 = -71.25%