147.6% is the change from 271 to 671
Calculation steps:
[( 671 - 271 ) ÷ 271] x 100 = 147.6%
Formula
Percentage change = [(671 - 271) / 271] x 100
Subtract the new number by the original number
671 - 271 = 400
400 ÷ 271 = 1.4760147601476015
1.4760147601476015 x 100 = 147.6%