Question

John uses $\frac{9}{10}$ of a cup of sugar to bake some cookies. If he has to bake triple the number of cookies, how many cups of sugar will he need?

• A. $\frac{1}{9}$ cups
• B. $\frac{3}{10}$ cups
• C. $\frac{10}{27}$ cups
• D. $\frac{27}{10}$ cups

Answer 1

The correct option is D $\frac{27}{10}$ cups

$\frac{9}{10}$ of a cup of sugar is needed for a given amount of cookies.
For triple the number of cookies, the required amount of sugar will also be tripled $=\frac{9}{10}\times 3=\frac{9\times 3}{10}$
$=\frac{27}{10}$ cups
Hence, John will need $\frac{27}{10}$ cups of sugar to bake the cookies.