82.76% is the change from 290 to 530
Calculation steps:
[( 530 - 290 ) ÷ 290] x 100 = 82.76%
Formula
Percentage change = [(530 - 290) / 290] x 100
Subtract the new number by the original number
530 - 290 = 240
240 ÷ 290 = 0.8275862068965517
0.8275862068965517 x 100 = 82.76%