74.91% is the change from 291 to 509
Calculation steps:
[( 509 - 291 ) ÷ 291] x 100 = 74.91%
Formula
Percentage change = [(509 - 291) / 291] x 100
Subtract the new number by the original number
509 - 291 = 218
218 ÷ 291 = 0.7491408934707904
0.7491408934707904 x 100 = 74.91%