85.36% is the change from 280 to 519
Calculation steps:
[( 519 - 280 ) ÷ 280] x 100 = 85.36%
Formula
Percentage change = [(519 - 280) / 280] x 100
Subtract the new number by the original number
519 - 280 = 239
239 ÷ 280 = 0.8535714285714285
0.8535714285714285 x 100 = 85.36%