427.5% is the change from 80 to 422
Calculation steps:
[( 422 - 80 ) ÷ 80] x 100 = 427.5%
Formula
Percentage change = [(422 - 80) / 80] x 100
Subtract the new number by the original number
422 - 80 = 342
342 ÷ 80 = 4.275
4.275 x 100 = 427.5%
Example