396.25% is the change from 80 to 397
Calculation steps:
[( 397 - 80 ) ÷ 80] x 100 = 396.25%
Formula
Percentage change = [(397 - 80) / 80] x 100
Subtract the new number by the original number
397 - 80 = 317
317 ÷ 80 = 3.9625
3.9625 x 100 = 396.25%
Example