3542.86% is the change from 7 to 255
Calculation steps:
[( 255 - 7 ) ÷ 7] x 100 = 3542.86%
Formula
Percentage change = [(255 - 7) / 7] x 100
Subtract the new number by the original number
255 - 7 = 248
248 ÷ 7 = 35.42857142857143
35.42857142857143 x 100 = 3542.86%