1) Given the proportion a/b = 11/20 , what ratio completes the equivalent proportion a/11 = ? (The answer needs to be a fraction)

2) A model is made of a car. The car is 3 meters long and the model is 4 centimeters long. What is the ratio of the length of the car to the length of the model?

RainbowPanda Mar 5, 2018

#1**+2 **

1) Given the proportion a/b = 11/20 , what ratio completes the equivalent proportion a/11 = ? (The answer needs to be a fraction)

Notice something, RP

If

5/10 = 1/2 then it is also true that the ratio of the numerators to the ratio of the denominators is the same....that is :

5/1 = 10/2

This implies that

a /b = 11/20 means that

a / 11 = b / 20

Do you see this??

2) A model is made of a car. The car is 3 meters long and the model is 4 centimeters long. What is the ratio of the length of the car to the length of the model?

Equate units in terms of centimeters

3 m = 300 cm

Ratio : actual length / model length = 300 cm / 4 cm = 75 / 1 = 75 : 1

CPhill Mar 5, 2018