Question

Robert correctly answered 30 of the total 50 questions in a math test. Can the part of the questions solved be written in decimal form?

• A. yes, a decimal is 0.6
• B. yes, a decimal is 0.4
• C. No
• D. yes, 0.8

Answer 1

The correct option is A yes, a decimal is 0.6

Total number of questions = 50
Questions answered correctly = 30

$\text{A part of the questions answered correctly}=\frac{30}{50}$

Let's divide the fraction $\frac{30}{50}$

We multiply both the numerator and denominator of $\frac{30}{50}$ with 2 to get a fraction with a denominator power of 10.

$\frac{30}{50}=\frac{30\times 2}{50\times 2}=\frac{60}{100}$

$\because$ Denominator of fraction $\frac{60}{100}$ is 100,
$\to$ Write the numerator as 60.0
$\to$ Shift the decimal point two places to the left in 60.0, since the denominator has two zeros (100)


$\Rightarrow \frac{60}{100}=\frac{60.0}{100}=0.60=0.6$

Hencce, Robert got 0.6 of the total question corrected.