82.44% is the change from 279 to 509
Calculation steps:
[( 509 - 279 ) ÷ 279] x 100 = 82.44%
Formula
Percentage change = [(509 - 279) / 279] x 100
Subtract the new number by the original number
509 - 279 = 230
230 ÷ 279 = 0.8243727598566308
0.8243727598566308 x 100 = 82.44%