73.88% is the change from 291 to 506
Calculation steps:
[( 506 - 291 ) ÷ 291] x 100 = 73.88%
Formula
Percentage change = [(506 - 291) / 291] x 100
Subtract the new number by the original number
506 - 291 = 215
215 ÷ 291 = 0.738831615120275
0.738831615120275 x 100 = 73.88%