What is 7/9-3/5=
The two fractions are: 7/9 and 3/5.
Give them both a common denominator by finding the LCM (least common multiple) of the two denominators.
The denominators are 9 and 5. Their LCM is 45.
Make both denominators equal to 45 by mutiplying top anf bottom of each fraction appropriately.
7/9 - 3/5 =
(7/9)*(5/5) - (3/5)*(9/9) =
(35/45) - (27/45) =
(35 - 27)/45 =
8/45