To find a fraction of a whole number, we will multiply the fraction by the whole number. In this case, we do not know the whole number, but we do know the answer.  So, we can substitute what we know. So, we get

$\displaystyle \frac{1}{4} \cdot x = 16$

Now, we will solve for x. We get

$\displaystyle \frac{1}{4} \cdot 4 \cdot x = 16 \cdot 4$

$\displaystyle x = 64$

To find a fraction of a number, we will multiply the two together. So, we get

$\displaystyle \frac{1}{2} \cdot \frac{4}{5}$

$\displaystyle \frac{1 \cdot 4}{2 \cdot 5}$

$\displaystyle \frac{4}{10}$

$\displaystyle \frac{2}{5}$

Therefore, $\displaystyle \frac{1}{2}$ of $\displaystyle \frac{4}{5}$ is $\displaystyle \frac{2}{5}$.

To find a fraction of a whole number, we will multiply the two together. So, we get

$\displaystyle \frac{2}{5} \cdot 25$

$\displaystyle \frac{2}{5} \cdot \frac{25}{1}$

Now, we can simplify before we multiply. The 5 and the 25 can both be divided by 5. So, we get

$\displaystyle \frac{2}{1} \cdot \frac{5}{1}$

$\displaystyle \frac{2 \cdot 5}{1 \cdot 1}$

$\displaystyle \frac{10}{1}$

$\displaystyle 10$

Therefore, $\displaystyle \frac{2}{5}$ of 25 is 10.

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

Now, we know a third is the same as $\displaystyle \frac{1}{3}$. So, we get

$\displaystyle \frac{1}{3} \cdot 36$

$\displaystyle \frac{1}{3} \cdot \frac{36}{1}$

$\displaystyle \frac{1 \cdot 36}{3 \cdot 1}$

$\displaystyle \frac{36}{3}$

$\displaystyle 12$

Therefore, a third of 36 is 12.

To find a fraction of a whole number, we will multiply the fraction by the whole number. In this case, we do not know the whole number, but we do know the answer. So, we can substitute what we know. So, we get

$\displaystyle \frac{1}{5} \cdot x = 19$

Now, we will solve for x. We get

$\displaystyle \frac{1}{5} \cdot 5 \cdot x = 19 \cdot 5$

$\displaystyle x = 95$

To find a fraction of a number, we will multiply the two together. 

Now, we know a third is the same as $\displaystyle \frac{1}{3}$. So, we get

$\displaystyle \frac{1}{3} \cdot 42$

$\displaystyle \frac{1}{3} \cdot \frac{42}{1}$

$\displaystyle \frac{1 \cdot 42}{3 \cdot 1}$

$\displaystyle \frac{42}{3}$

$\displaystyle 14$

Therefore, a third of 42 is 14.

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

Now, we know a quarter is the same as $\displaystyle \frac{1}{4}$. So, we get

$\displaystyle \frac{1}{4} \cdot 60$

$\displaystyle \frac{1}{4} \cdot \frac{60}{1}$

$\displaystyle \frac{1 \cdot 60}{4 \cdot 1}$

$\displaystyle \frac{60}{4}$

$\displaystyle 15$

Therefore, a quarter of 60 is 15.

To find a fraction of a whole number, we will multiply the two together. So, we get

$\displaystyle \frac{2}{3} \cdot 93$

$\displaystyle \frac{2}{3} \cdot \frac{93}{1}$

Now, we can simplify to make things easier. The 3 and the 93 can both be divided by 3. So, we get

$\displaystyle \frac{2}{1} \cdot \frac{31}{1}$

$\displaystyle \frac{2 \cdot 31}{1 \cdot 1}$

$\displaystyle \frac{62}{1}$

$\displaystyle 62$

Therefore, $\displaystyle \frac{2}{3}$ of 93 is 62.

To find a fraction of a whole number, we will multiply the two numbers together. So, we get

$\displaystyle \frac{3}{4} \cdot 88$

$\displaystyle \frac{3}{4} \cdot \frac{88}{1}$

Now, we can simplify. The 4 and the 88 can both be divided by 4. So, we get

$\displaystyle \frac{3}{1} \cdot \frac{22}{1}$

$\displaystyle \frac{3 \cdot 22}{1 \cdot 1}$

$\displaystyle \frac{66}{1}$

$\displaystyle 66$

Therefore, $\displaystyle \frac{3}{4}$ of 88 is 66.

To find a fraction of a whole number, we will multiply the two together. So, we get

$\displaystyle \frac{1}{3} \cdot 54$

$\displaystyle \frac{1}{3} \cdot \frac{54}{1}$

$\displaystyle \frac{1 \cdot 54}{3 \cdot 1}$

$\displaystyle \frac{54}{3}$

$\displaystyle 18$

Therefore, $\displaystyle \frac{1}{3}$ of $\displaystyle 54$ is $\displaystyle 18$.