7th grade ratio and proportion

Question 1

Juice and water are mixed in the ratio 3:4. What fraction of the drink is juice? Give a fraction in simplest form.

Answer (as a fraction)

Question 2

The line passes through (0, 0) and (3, 12). What is the constant of proportionality?

Answer 

Question 3

On a school trip, 1 euro buys 0.8 Swiss francs. How many francs do you get for 190 euros?

Answer 

Question 4

A recipe uses 2/3 cup of oats for 1/3 of a batch. How many cups of oats are needed for a whole batch?

Answer (as a fraction)

Question 5

A 20 m long room is drawn 10 cm long on a plan. The scale is 1 : n. What is n?

Answer 

Question 6

Solve: 9 / 6 = 90 / n

n = 

Question 7

A car uses fuel in proportion to distance: f = 0.08d (litres per km). How many litres for 140 km?

Answer 

Question 8

Each streaming song earns 13 points. Write an equation for y in terms of s. Type only the right-hand side (y = …).

Answer 

Question 9

Sofia enlarges a scale drawing so every length is 5 times as long. Sofia thinks the area will be 5 times as big. How many times as big is the area really?

Answer 

Question 10

A pancake recipe for 4 people uses 200 g of flour. How much flour is needed for 12 people, in grams?

Answer 

Question 11

Concrete is made from cement, sand and gravel in the ratio 1:5:4. A builder uses 135 kg of sand. How many kg of concrete mix is that altogether?

Answer 

Question 12

Solve: x / 45 = 8 / 9

x = 

Question 13

4/5 of a choir are sopranos and the rest are altos. What is the ratio of sopranos to altos, in simplest form? Type it like 2:3.

Answer 

Question 14

The ratio of adults to children at a show is 2:7. There are 35 more children than adults. How many people are there in total?

Answer 

Question 15

A model uses 1 cm for every 10 m. A real bridge is 20 m long. How long is it on the model, in cm?

Answer 

Question 16

Solve: 3 / 13 = 21 / y

y =