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Grades 6, 7 and 8 - Math - Middle School - Ratio
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Ratio is the relation between two numbers or quantities. It is useful for showing the number of times one value contains or is contained within the other. For instance in the ratio 1:3, if 1 is sand and 3 is water, you would need three times the amount of water in relation to sand. Ratios help us to visualize how different numbers of things compare to one another. They are also very similar to fractions. The ratios 1:3 and 2:3 can also be represented by the fractions  1⁄3 and  2⁄3. Tip: if you reverse the order of the numbers in a ratio, the ratio changes. 2:1 is NOT the same as 1:2. The... Show more
Grades 6, 7 and 8 - Math - Middle School - Ratio
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25 Questions

1. If there is a 5:2 ratio between black squares and white squares which number represents the white squares?
2. In a box of chocolates there are 4 milk chocolates to 3 dark chocolates. How many dark chocolates in a box of 49 chocolates?
3. How else can the ratio 0.125:1.25:2.125 be written?
4. The ratio of brown rats to black rats is 4:8. If there are 24 black rats, how many brown rats are there?
5. Jo mixes 400ml of orange juice to every 200ml of pineapple juice to make a fruit cocktail. How much orange juice will she need to make 900ml of fruit cocktail?
6. Each of the following ratios show the ratio of girls to boys in three classes. If each class has the same number of pupils, which of the classes has the greatest ratio of girls to boys: 16:20, 8:10, 1:1.25?
7. A cookie recipe needs 250g flour, 150g of sugar and 150g of butter to make 6 cookies. How much butter is needed to make 18 cookies?
8. In a grid of 10 squares 4 are white and the rest are blue. What is the ratio of white to blue?
9. For every 2 black squares there is 1 white square. What is the ratio of black to white?
10. The ratio of green bottles to white bottles is 3:4. What fraction of the bottles is white?
11. When making a cake, for every 400g of flour 200g of sugar is required. What is another way of saying this?
12. Zara uses 20ml of fruit concentrate for every 60ml of water. How much fruit concentrate will she require for 180ml of water?
13. One hundred paintings have to be selected for an art exhibition. If the ratio of amateur paintings to professional paintings has to be 2:3, how many amateur paintings and professional paintings have to be selected?
14. What are the fractional parts of the ratio 2:9?
15. 2⁄5 of the dogs are Labradors and 3⁄5 are Alsatians. What is this fact expressed as the ratio of Alsatians to Labradors?
16. How else can the ratio 5:1.25:3 be written?
17. The ratio between blue boxes and yellow boxes is 3:2. If there are 4 yellow boxes how many blue boxes are there?
18. In every 10 bricks, 3 are red. We have 30 bricks so how many are red?
19. There are 2 white cubes for every 1 blue cube. What proportion are blue cubes to white cubes?
20. John has twice as many stamps than Yasif. If Yasif has 5 stamps how many stamps does John have?
21. The proportion of brick houses in every 20 is 3⁄10. How many brick houses in a street of 100 houses?
22. Chicken should be cooked for 50 minutes for every kg. How long will it take to cook a 3kg chicken?
23. How else can the ratio 7:1.5 be written?
24. Lucy mixes 4 small pots of white paint with 1 small pot of red paint to make 1 large tin of pink paint. She requires 5 large tins of pink paint. How many small pots of white paint does she need?
25. If 1,000 toy soldiers are divided into three parts, Alan gets 260, Brian gets 340 and Charles gets 400, what is this as the ratio A:B:C in its lowest form?

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