Question

Stuart ate three-fifth of a pizza and Albert ate one-fifth of a pizza. Calculate the total parts of pizza eaten by Stuart and Albert (in decimals). Which of the following markings on the number line represents the value of the total parts of pizza eaten by Stuart and Albert?

• A. H
• B. C
• C. E
• D. D

Answer 1

The correct option is A H

Fraction of pizza eaten by Stuart = $\frac{3}{5}$

Let’s represent this fraction using a bar model.


Fraction of pizza eaten by Albert = $\frac{1}{5}$
Let’s represent this fraction using a bar model.



Let’s find the total parts of pizza eaten by both Stuart and Albert.

$\frac{3}{5}+\frac{1}{5}=\frac{3+1}{5}=\frac{4}{5}$

Now, let’s represent 4/5 in decimal form.

For that, we will have to make the denominator 100.
Multiply the numerator and denominator by 20.

$\frac{4}{5}=\frac{4\times 20}{5\times 20}$

$\frac{4\times 20}{5\times 20}=\frac{80}{100}$

$\frac{1}{100}$ represents one-hundredths, which is equal to 0.01. So,$\frac{80}{100}$ represents 80 hundredths and is equal to 0.80.

$\frac{80}{100}=0.80$



So, H is the correct answer.