513.75% is the change from 80 to 491
Calculation steps:
[( 491 - 80 ) ÷ 80] x 100 = 513.75%
Formula
Percentage change = [(491 - 80) / 80] x 100
Subtract the new number by the original number
491 - 80 = 411
411 ÷ 80 = 5.1375
5.1375 x 100 = 513.75%
Example