66.05% is the change from 271 to 450
Calculation steps:
[( 450 - 271 ) ÷ 271] x 100 = 66.05%
Formula
Percentage change = [(450 - 271) / 271] x 100
Subtract the new number by the original number
450 - 271 = 179
179 ÷ 271 = 0.6605166051660517
0.6605166051660517 x 100 = 66.05%