The lowest common denominator is 12. The problem now becomes

5 3/12-4 2/12= 1 1/12

find the common de nominator 2nd number of the fraction 4 x 6 = 24 so the eguation now becomes 5 6/24 - 4 4/24 = 1 and 2/24 or 1 and 1/12

Lowest Common Denominator is 12. Convert the fractions to 12ths. Then it's just a simple subtraction

5 3/12 - 4 2/12 = 1 1/12

I can only agree with the other 3 answers, unless you wish to convert to decimal, but as your question is about fractions, then pointless.

My late wife could never do fractions either.