480% is the change from 55 to 319
Calculation steps:
[( 319 - 55 ) ÷ 55] x 100 = 480%
Formula
Percentage change = [(319 - 55) / 55] x 100
Subtract the new number by the original number
319 - 55 = 264
264 ÷ 55 = 4.8
4.8 x 100 = 480%
Example