86.38% is the change from 279 to 520
Calculation steps:
[( 520 - 279 ) ÷ 279] x 100 = 86.38%
Formula
Percentage change = [(520 - 279) / 279] x 100
Subtract the new number by the original number
520 - 279 = 241
241 ÷ 279 = 0.8637992831541219
0.8637992831541219 x 100 = 86.38%