what is 4 2/7 X 2 1/5?
express in simplest form.

Question

what is 4 2/7 X 2 1/5?
express in simplest form.

phi · Answer

can you write 4 2/7 as an improper fraction ?

anonymous · Answer

its 30/7

phi · Answer

yes.  now do the same for 2 1/5

anonymous · Answer

11/5

phi · Answer

now you have
$$ \frac{30}{7}\cdot \frac{11}{5} $$
you multiply top times top and bottom times bottom
BUT... it's simpler to first look for numbers that you can simplify.
notice 30 can be divided by 5  and 5 (in the bottom) can be divided by 5
so do that:
$$ \frac{\cancel{30}6}{7}\cdot \frac{11}{\cancel{5}1} $$

now do  top times top and bottom times bottom

anonymous · Answer

ok thanks :)

phi · Answer

what do you get ?

anonymous · Answer

1 sec

anonymous · Answer

66/7

phi · Answer

now change back to a whole number plus a fraction.

anonymous · Answer

that would be 9 and something over umm7

phi · Answer

the remainder over the divisor (i.e over 7)

you can check your answer by changing it back into an improper fraction .. if you did it correctly, you get back 66/7

anonymous · Answer

ya i know that the answer is 9 and something over 7 but i cant get that part cuz i dont know how

phi · Answer

7 goes into 66    9 times

7*9= ?

anonymous · Answer

63

phi · Answer

yes.

Here is how you divide:
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