Question

Brandy exercised 4/5 hour on Monday and 5/6 hour on Tuesday.

Answer 1

So the work you have shown is incorrect

So when your trying to get 2 different denominations of fractions to be the same you have to find the lowest common denominator for example
5,10,15,20,25,30,35,40
6,12,18,24,30,36

So the answer is 1 19/30