66.42% is the change from 271 to 451
Calculation steps:
[( 451 - 271 ) ÷ 271] x 100 = 66.42%
Formula
Percentage change = [(451 - 271) / 271] x 100
Subtract the new number by the original number
451 - 271 = 180
180 ÷ 271 = 0.6642066420664207
0.6642066420664207 x 100 = 66.42%