# What is ratio?

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##### Examples

###### Lessons

**Understanding Ratio Tables**Fill in the blanks in the following ratio table.

x y 4 8 14 21 **Part-to-part Ratio Vs. Part-to-whole Ratio**There are 14 boys and 16 girls in a particular class.

- Charlie bought 2 Superman action figures and they are 4.4 cm and 9 cm tall respectively. What is the ratio of the height of the smaller figure to the larger figure?
**Evaluate Ratios Involving Unit Conversion**Betty and Mary participated in a 400 m sprint. Betty finished it in 1 min 40 sec while Mary finished it in 2 min 15 sec. What is the ratio of Mary's time to Betty's time?

**Determine the Scale of a Map (Ratio)**The distance between two cities on a map is 4 cm. If the real distance between the cities is 28 km, what is the scale of the map?

- A Tyrannosaurus (a dinosaur) is 12.3 m in length. If a model was built using the ratio 1:15, what is the length of the model?
**Analyze Ratios of 3 Objects**A bank wants to maintain the managers, analysts and tellers in the ratio 2:5:18. If 15 analysts were hired, how many managers and tellers should they hire?