17.86% is the change from 280 to 330
Calculation steps:
[( 330 - 280 ) ÷ 280] x 100 = 17.86%
Formula
Percentage change = [(330 - 280) / 280] x 100
Subtract the new number by the original number
330 - 280 = 50
50 ÷ 280 = 0.17857142857142858
0.17857142857142858 x 100 = 17.86%