272.78% is the change from 180 to 671
Calculation steps:
[( 671 - 180 ) ÷ 180] x 100 = 272.78%
Formula
Percentage change = [(671 - 180) / 180] x 100
Subtract the new number by the original number
671 - 180 = 491
491 ÷ 180 = 2.727777777777778
2.727777777777778 x 100 = 272.78%