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When multiplying by a fraction, multiply numerators and multiply denominators, if possible,reduce it to the lowest fraction.

1) 5/8 x 7/5

First multiply numerators (top numbers) and then multiply bottom numbers.

5/8 x 7/5 = ( 5 x 7)/(8 x 5)

= 35/40

Now write the fraction in lowest form.

As both the numbers are divisible by 5.

So, (35 ÷5)/( 40 ÷ 5)

= 7/8

2) 11/4 x 3/7

11/4 x 3/7 = (11 x 3)/(4 x 7)

= 33/28

As both the numbers are not divisible by any common number

So, 11/4 x 3/7 = 33/28

Number of boards =7

Required board for one shelf = 1/2

So total boards we have = 14 (half boards)(7 x 2/1=14)

Number of cement blocks = 16

Required cement blocks =2

See the diagram

In this way number of shelves = 8

2) What is one-third of two-fifth?

One-third = 1/3

two-fifth = 2/5

So, 1/3 of 2/5 = 1/3 x 2/5

= (1 x 2)/(3 x 5)

= 2/15

3) What is one-half of one dozen mango?

One-half = 1/2

one dozen mango = 12 mangoes

So, 1/2 of 12 = 12/2

= 6 mangoes

• Types of Fractions

• Conversion of improper to mixed fraction

• Equivalent Fractions

• Fractions in Simplest form

• Like and Unlike Fractions

• Add fractions

• Subtraction of fractions

• Multiplying Fractions

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