So 2 and 3 quarters add 1 and 1 fits

I meant 3 and 3 quarters add 1 and 1 fifth equals...  
Next time, type something like this:  Add 3 and 3 quarters to 1 and 1 fifth"

3 3/4  +  1 1/5

Method 1:  convert these mixed numbers into decimal fractions:
3.75+1.20 = 4.95, or 4 95/100, or 4 19/20.

Method 2:  Recognize that the LCD is (4)(5) = 20 and convert both 3/4 and 1/5 to fractions with denominator 20:  

3 3/4 + 1 1/5 = 3 15/20 + 1 4/20 = 4 19/20 (answer).

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