74.23% is the change from 291 to 507
Calculation steps:
[( 507 - 291 ) ÷ 291] x 100 = 74.23%
Formula
Percentage change = [(507 - 291) / 291] x 100
Subtract the new number by the original number
507 - 291 = 216
216 ÷ 291 = 0.7422680412371134
0.7422680412371134 x 100 = 74.23%