Question

Marty takes 11/4 hours to get ready for school 1/5 of that time to shower what fraction of an hour takes him to shower

Answer 1

1/5 * 11/4 = 11/20

unless you meant to say it takes 1 1/4 hours. In that case,
1/5 * 5/4 = 1/4

Answer 2

I think maybe you can find the LCM of the 2 fractions (look at denominator)! Find the factor that give you a sum of that LCM (factor x denominator = LCM number)?