375% is the change from 80 to 380
Calculation steps:
[( 380 - 80 ) ÷ 80] x 100 = 375%
Formula
Percentage change = [(380 - 80) / 80] x 100
Subtract the new number by the original number
380 - 80 = 300
300 ÷ 80 = 3.75
3.75 x 100 = 375%
Example