426.25% is the change from 80 to 421
Calculation steps:
[( 421 - 80 ) ÷ 80] x 100 = 426.25%
Formula
Percentage change = [(421 - 80) / 80] x 100
Subtract the new number by the original number
421 - 80 = 341
341 ÷ 80 = 4.2625
4.2625 x 100 = 426.25%
Example