They're having a 38% off sale and if it cost 22.00 dollars how much will it be on sale

38% off of 22.00

find 38% of 22.00 and subtract it from 22.00

percent means parts out of 100

38%=38/100=0.038

'of' means multiply

38% of 22.00=

0.38 times 22.00=

8.36

8.36 off of 22.00

22.00-8.36=13.64

costs $13.64

The would be $8.36 so you would be saving $13.64.