Danielle's friend called her asking for a piece of rope that is 3/10 of a yard long. Danielle has one that is 5/7 of a yard long. How can Danielle figure out if this is long enough for her friend to use?
A.
Subtract the numerators and denominators to make a new fraction.
B.
Change 5/7 to a mixed number.
C.
Multiply 3/10 by 5/7.
D.
Find a common denominator. Multiply and divide by suitable numbers and make each fraction to have common denominator and then compare the numerators.