79.31% is the change from 290 to 520
Calculation steps:
[( 520 - 290 ) ÷ 290] x 100 = 79.31%
Formula
Percentage change = [(520 - 290) / 290] x 100
Subtract the new number by the original number
520 - 290 = 230
230 ÷ 290 = 0.7931034482758621
0.7931034482758621 x 100 = 79.31%