Question

A bag contains 2 1/4 kilograms of flour. Anthony needs 3 1/2 bags of flour to make bread. How many kilograms of flour does anthony need?

6 1/8
6 3/4
7 3/8
7 7/8

Answer 1

Answer:

7 7/8

Step-by-step explanation:

Covert the mixed fractions into improper fractions to make this easier.

2 $\frac{1}{4} and 3\frac{1}{2}$ into $\frac{9}{4} (2*4 +1) and \frac{7}{2} (3*2+1)$. (In parenthesis, its the process of creating the improper fractions and not part of the fractions themselves.

Now you just multiply both together since 1 bag needs 2 1/4 kilograms and Anthony needs  3 1/2 bags.

That gets you $\frac{63}{8}$ which you get by multiplying 9 and 7 in the numerator and 4 and 2 in the denominator

Finally, find out how many 8 goes into 63 which would be 7 times. 63-(7*8) = 7.

And so the answer is 7 7/8