Ratios

Lessons

• Introduction
  Introduction to Ratios
  a)

  Introduction to Ratios
  
  
  b)

  What are equivalent ratios?
  
  
  c)

  Ratios, Rates, and Proportions

  • What are they?
  • How are they different from each other?
  
  

---

• 1.
  Write the following ratios using ratio notation in lowest terms.
  a)

  5 km in 30 minutes.
  
  
  b)

  4 cases for $500.
  
  
  c)

  5 cupcakes need 325 g of flour.
  
  
  d)

  130 mm of precipitation in 2 days.
  
  

---

• 2.
  Write the following ratios in fraction form in lowest terms.
  a)

  3 hours in 1 week.
  
  
  b)

  35 g sugar in a 335 ml can of pop.
  
  
  c)

  4 servers to serve 6 tables with 4 guests each.
  
  
  d)

  22 sheep and 30 cows. What is the ratio of sheep to the total number of animals?
  
  

---

• 3.
  The following table shows the sugar and flour needed for different kinds of bakery.

  Bakery	Sugar (g)	Flour (g)
  Cake	40	120
  Cookie	20	60
  bread	30	450

  a)

  Which 2 kinds of bakery have the same sugar-flour ratio? Show your work.
  
  
  b)

  What is the ratio of sugar needed for cookie to the total weight of sugar needed for all 3 kinds of bakery?
  
  

---

• 4.
  Ratios With Decimals

  Simplify the following ratios.

  a)

  1.2 : 4
  
  
  b)

  1.4 : 1.6
  
  

---

• 5.
  Ratios With Fractions

  Simplify the following ratios.

  a)

  $\frac{2}{5} : 4$
  
  
  b)

  $\frac{2}{3} : \frac{7}{8}$
  
  

---

• 6.
  Ratios in Different Units

  Simplify the following ratios.

  a)

  $5 cm : 30 km$
  
  
  b)

  $4 hr 15 min : 3hr 30 min$
  
  

---

• 7.
  Application of Ratios

  Jack and Jill are to share the candies in the ratio 3:4. If there are 21 candies in total, how many candies does each of them get?

---

• 8.
  Harry and Sally got some pocket money from their mother and they were to split it in the ratio 3:5. If Sally got $30, how much money in total did their mother give them?

---