19.64% is the change from 280 to 335
Calculation steps:
[( 335 - 280 ) ÷ 280] x 100 = 19.64%
Formula
Percentage change = [(335 - 280) / 280] x 100
Subtract the new number by the original number
335 - 280 = 55
55 ÷ 280 = 0.19642857142857142
0.19642857142857142 x 100 = 19.64%