Question

Stuart's classroom has 36 windows. 8 of them cannot be opened. What is the fraction of windows that can be opened, in the simplest form?

• A. $\frac{7}{9}$
• B. $\frac{2}{9}$
• C. $\frac{28}{36}$

Answer 1

The correct option is A $\frac{7}{9}$

Total number of windows = 36
Number of windows that cannot be opened = 8
Number of windows that can be opened = 36 - 8 =28
Fraction of windows that can be opened = $\frac{28}{36}$
= $\frac{2\times 2\times 7}{2\times 2\times 9}$
= $\frac{7}{9}$