[tex]1\frac23-\frac34[/tex]
Write 1 2/3 as an improper fraction...
1 = 3/3. Plus the 2/3 makes 5/3.
[tex]\frac53-\frac34[/tex]
To add/subtract fractions, they need the same denominator. (bottom number)
We can change the denominator by multiplying the top and bottom of a fraction by the same number. (it will stay equal, like 1/2 and 2/4)
Let's change 5/3 and 3/4 to a denominator of 12.
5/3 = 20/12 (bottom multiplies by 4, so does the top)
3/4 = 9/12 (bottom multiplies by 3, so does the top)
[tex]\frac{20}{12}-\frac9{12}[/tex]
Now we just subtract the 20 minus 9 twelfths. (the twelfths act as a sort of unit)
[tex]\boxed{\frac{11}{12}}[/tex]
