To find a fraction of a whole number, we will multiply the fraction by the whole number.  So,

 of 

we can write it as

To multiply, we will write  in fraction form.  We get

Now, we multiply straight across.

To find a fraction of a whole number, we will multiply the fraction by the whole number. 

So,

  of 

can be written as

Now, to multiply, we will write 91 in fraction form.  We get

Now, we can multiply straight across.  We get

Therefore,  of  is .

To find a fraction of a whole number, we will multiply the fraction by the whole number.  So,

 of 

can be written as

To multiply we will write 24 as a fraction.  We get

To make multiplication easier, we will simplify before we multiply.  We can simplify the 3 and the 24.  We get

Now, we can multiply straight across.

Therefore,  of  is .

To find a fraction of a whole number, we will multiply the fraction by the whole number.  

So, 

 of 

can be written as

Now, to multiply, we need to write  as a fraction.  We know that any whole number can be written as the number over 1.  So, we get

Now, we can simplify before we multiply to make things easier.  The 4 and 36 can simplify.  Each number can be divided by 4.  We get

Now, we can multiply straight across.  We get

Therefore,   of  is .

To find a fraction of a whole number, we will multiply the fraction by the whole number. 

So, the problem

 of 

can be re-written as

To multiply, we will write 36 as a fraction.  We know that a whole number can be written as the number over 1.  So, 

Now, we will multiply straight across.  We get

Therefore,  of  is .

To find a fraction of a whole number, we will multiply the fraction by the whole number. 

So,

 of 

can be written as

Now, we will write 21 as a fraction.  We know that whole numbers can be written as a fraction over 1.  So,

Now, we can multiply.  We get

Therefore,  of  is .

To find a fraction of a whole number, we simply multiply the fraction by the whole number. 

So, given the problem

third of 

we will first write third as a fraction.  We know that third is the same as . So, we can write

 of 

Now, we can multiply.

To multiply, we will write 33 as a fraction.  We know that we can write a whole number as a fraction over 1.  So, we get

Now, we multiply straight across.  We get

Therefore, a third of  is .

To find a fraction of a whole number, we will multiply the fraction by the whole number. So, in the problem

three-quarters of 24

we will first write three-quarters as a fraction.  We know that three-quarters can be written as .  So, we can re-write the problem as

 of 

Now, we will multiply them together.  We get

To multiply, we will write 24 as a fraction.  To write a whole number as a fraction, we can write it over 1.  So, we get

Now, before we multiply, we can simplify to make things easier.  The 4 in the denominator of the first fraction and the 24 in the numerator of the second fraction can both be divided by 4.  So, we get

Now, we can multiply.  We will multiply straight across.  We get

Therefore, three-quarters of 24 is 18.

To find a fraction of a whole number, we will multiply the fraction by the whole number.  So, in the problem

 of 

we can re-write it as

Now, we will write 36 as a fraction.  We know that whole numbers can be written as fractions over 1.  So, we get

Now, before we multiply, we will simplify to make things easier.  The 3 and the 36 can both be divided by 3.  So, we get

Now, we can multiply straight across.  We get

Therefore,  of  is .

To find a fraction of a whole number, we will multiply the fraction by the whole number. So, in the problem

two-thirds of 24

we will first write two-thirds as a fraction.  We know two-thirds can be written as .  So, we can write

 of 

Now, we can multiply them.  We get

Before we can multiply, we need to write 24 as a fraction.  We know whole numbers can be written as fractions over 1.  So, we get

Now, we can simplify before we multiply to make things easier.  The 3 and the 24 can both be divided by 3.  So, we get

Now, we can multiply straight across.  We get

Therefore, two-thirds of 24 is 16.