68.63% is the change from 271 to 457
Calculation steps:
[( 457 - 271 ) ÷ 271] x 100 = 68.63%
Formula
Percentage change = [(457 - 271) / 271] x 100
Subtract the new number by the original number
457 - 271 = 186
186 ÷ 271 = 0.6863468634686347
0.6863468634686347 x 100 = 68.63%