375% is the change from 8 to 38
Calculation steps:
[( 38 - 8 ) ÷ 8] x 100 = 375%
Formula
Percentage change = [(38 - 8) / 8] x 100
Subtract the new number by the original number
38 - 8 = 30
30 ÷ 8 = 3.75
3.75 x 100 = 375%
Example