75.6% is the change from 291 to 511
Calculation steps:
[( 511 - 291 ) ÷ 291] x 100 = 75.6%
Formula
Percentage change = [(511 - 291) / 291] x 100
Subtract the new number by the original number
511 - 291 = 220
220 ÷ 291 = 0.7560137457044673
0.7560137457044673 x 100 = 75.6%