Question 703616
10/7(3/7-3/70)

Work inside the parenthesis first =). First of all, you want those two fractions to have a common denominator, so multiply the first fraction by 10/10 to get:

10/7(30/70-3/70), which simplifies to:
10/7(27/70). You then can multiply THESE fractions, yielding:
270/490, which simplifies to 27/49.