Question

Fraction multiplying by fractions

Answer 1

2             3
--- * ? = ---
9           15

We want to find the fraction represented by " ? " above.

We want to isolate the " ? "  so mult both sides by the inverse of (2/9):

(9/2)(2/9) f = (3/15)(9/2) = 27/30 = 9/10  
 
           so the unknown fraction is 9/10.

Check your work:  Is (2/9)(9/10) = 3/15?  Is 1/5 = 1/5?  YES.