Amy knits 1/10 of a scarf in 4/3 of an hour. What fraction of a scarf can any knit in one hour

Answer 1

1/10

------

4/3

equals

?

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1

Cross multiplies:

1/10 = (4/3)* ?

(1/10)(3/4) = 3/40 <--- multiplies both sides by 3/4 to solve it

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Another way to think of it like this:

Knits 1/10 of the scarf in 4/3 hour

Knits 1/40 of the scarf in 1/3 hour <--- divides everything by 4

Knits 3/40 of the scarf in 1 hour <--- multiplies everything by 3