Question

Which of the following fruits costs the lowest?

• A. Pineapple
• B. Grapes
• C. Banana
• D. Both grapes and banana

Answer 1

The correct option is B Grapes

$\text{Let's find the fruit that}$ $\text{costs the lowest.}$

$\text{Cost of pineapple =}\$\frac{6}{10}$

$\text{Cost of grapes =}\$\frac{14}{20}$

$\text{Cost of banana =}\$\frac{21}{50}$

Let's convert the cost into decimals by making the denominators 100.

$\frac{6\times 10}{10\times 10}=$$\frac{60}{100}$

$\frac{14\times 5}{20\times 5}=$$\frac{70}{100}$

$\frac{21\times 2}{50\times 2}=$$\frac{42}{100}$

$\text{Write}\frac{60}{100}\text{as 0.6}$

$\frac{70}{100}\text{as 0.7,}$ $\text{and}\frac{42}{100}\text{as 0.42.}$

$\text{Hence, the cost of pineapple =}$ $\$0.6$

$\text{and the cost of grapes =}$ $\$0.7$

$\text{and the cost of banana =}$ $\$0.42$

Let's place the numbers on a number line.


$\text{Here, 0.42 is smaller}$$\text{because it is on the left side}$ $\text{of 0.6 and 0.7 on the number line.}$

$\text{So, the number on the}$$\text{left side of the number line}$ $\text{is always the smaller.}$

$\text{Hence, the cost of banana is the lowest.}$