Question

If 9 exercise books cost $12.33 what is the cost of 5 books?

Answer 1

9 exercise books cost

= $12.33

1 exercise book costs

= $ ${\frac{12.33}{9}}$

5 exercise books cost

= $ ${\frac{12.33}{9}}$ × 5

= $ ${\frac{61.65}{9}}$

= $ ${\frac{20.55}{3}}$ (divided by 3)

= $ ${\frac{6.85}{1}}$ (divided by 3)

= $ ${\boxed{6.85}}$