79.66% is the change from 290 to 521
Calculation steps:
[( 521 - 290 ) ÷ 290] x 100 = 79.66%
Formula
Percentage change = [(521 - 290) / 290] x 100
Subtract the new number by the original number
521 - 290 = 231
231 ÷ 290 = 0.7965517241379311
0.7965517241379311 x 100 = 79.66%