77.86% is the change from 280 to 498
Calculation steps:
[( 498 - 280 ) ÷ 280] x 100 = 77.86%
Formula
Percentage change = [(498 - 280) / 280] x 100
Subtract the new number by the original number
498 - 280 = 218
218 ÷ 280 = 0.7785714285714286
0.7785714285714286 x 100 = 77.86%