-55% is the change from 480 to 216
Calculation steps:
[( 216 - 480 ) ÷ 480] x 100 = -55%
Formula
Percentage change = [(216 - 480) / 480] x 100
Subtract the new number by the original number
216 - 480 = -264
-264 ÷ 480 = -0.55
-0.55 x 100 = -55%
Example