SOLUTION: 7/5 * ?/? = 18 3/4 my twelve year old needs help solving this

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Question 784258: 7/5 * ?/? = 18 3/4 my twelve year old needs help solving this
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
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7/5 * ?/? = 18 3/4 my twelve year old needs help solving this
Convert 18 3/4 to an improper fraction
18*4 + 3 = 75, so we have
7%2F5 * ____ = 75%2F4
____ = 75%2F4 divided by 7%2F5
When you divide fractions, invert the divisor and multiply
____ = 75%2F4 * 5%2F7
Multiply the numerators and the denominators resulting in
375%2F28
To convert back to a mixed number use long division 28|375 you should get
13 11/28