How to find the least common denominator with fractions?

Mathematics

2 answers:

Scrat [10]4 years ago

3 0

Find out what the lowest number is that each of the numbers on the bottom of the fractions can divide into evenly.

pashok25 [27]4 years ago

3 0

Divide the top and bottom by factors that will go into both evenly until there is no more factors that will go into both of them.

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3 m equals how many mm

Gnoma [55]

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If a 10-pound sack of potatoes costs $6.55, how much would 1 pound cost? Round your answer to the nearest cent.

Black_prince [1.1K]

$\begin{array}{ccc}10\ lb&-&\$6.55\\\\1\ lb&-&\$ x\end{array}\ \ \ |cross\ multiply\\\\\\\\10\cdot x=1\cdot6.55\\\\10x=6.55\ \ \ \ |divide\ both\ sides\ by\ 10\\\\x=\frac{6.55}{10}\\\\x=0.65\underline{5}\approx\boxed{\$0.66}\\$

If the number you are rounding is followed by 5, 6, 7, 8, or 9, round the number up (+1).

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3 years ago

What is the lcm of 42 and 70

liubo4ka [24]

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7 0

3 years ago

Thank you for helping me

Tresset [83]

Answer:

-8

Step-by-step explanation:

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If it takes 3 days for 10 workers to finish building one house, how many days will it take 15 workers to finish four houses?

Ksivusya [100]

-- It takes 10 workers 3 days to build 1 house.
so
-- It takes 10 workers 1 day to build 1/3 of a house.
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You got 15 workers and you need 4 houses ?

Well, as we just calculated . . .

-- It takes 1 worker 1 day to build 1/30 of a house.
so
-- It takes 15 workers 1 day to build 15/30 = 1/2 of a house.
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