Question

John wrote a story for $\frac{1}{10}$ hours on day $1$ and $\frac{7}{100}$ hours on day $2.$ How many total hours did he spend writing the story?

• A. $\frac{8}{10}h$
• B. $\frac{8}{10}h$
• C. $\frac{8}{100}h$
• D. $\frac{17}{100}h$

Answer 1

The correct option is D $\frac{17}{100}h$

Time spent writing the story on day $1=\frac{1}{10}h$
Time spent writing the story on day $2=\frac{7}{100}h$
Total time spent writing on both the days $=\frac{1}{10}+\frac{7}{100}$
To add $\frac{1}{10}$ and $\frac{7}{100}$, we need to make their denominators the same.
First, we have to find an equivalent fraction of $\frac{1}{10}$ with $100$ as the denominator.
So, we multiply both the numerator and denominator of $\frac{1}{10}$ by $10$.
$\frac{1\times 10}{10\times 10}=\frac{10}{100}$
Now, we can add the two fractions.
$\frac{10}{100}+\frac{7}{100}=\frac{17}{100}$
So, John spent $\frac{17}{100}$ hours writing the story in total.