172.78% is the change from 180 to 491
Calculation steps:
[( 491 - 180 ) ÷ 180] x 100 = 172.78%
Formula
Percentage change = [(491 - 180) / 180] x 100
Subtract the new number by the original number
491 - 180 = 311
311 ÷ 180 = 1.7277777777777779
1.7277777777777779 x 100 = 172.78%