Step: 1

Let n be the cost of 27 pizzas.

Step: 2

[Write a possible proportion.]

Step: 3

9 × n = 19 × 27

[Write the cross products.]

Step: 4

9 × n = 513

[Multiply.]

Step: 5

[Divide each side by 9.]

Step: 6

Step: 7

The cost of 27 pizzas is $57.

Correct Answer is : $57

Step: 1

Let n be the number of horse rides Andrew enjoyed.

Step: 2

[Write a proportion in terms of rides amount .]

Step: 3

4 × 20 = 10 × n

[Write the cross products.]

Step: 4

80 = 10n

[Multiply.]

Step: 5

[Divide both sides by 10.]

Step: 6

8 = n

Step: 7

Number of rides Andrew enjoyed is 8.

Correct Answer is : 8

Step: 1

Let n be the total number of people in the family.

Step: 2

[Write a possible proportion.]

Step: 3

5.50 × n = 44 × 1

[Write the cross products.]

Step: 4

5.50 n = 44

[Multiply.]

Step: 5

[Divide both sides by 5.50.]

Step: 6

Step: 7

The total number of members in the family = 8.

Correct Answer is : 8

Step: 1

Let $x be the required amount.

Step: 2

[Write a proportion.]

Step: 3

3 × x = 6 × 2.5

[Cross multiply.]

Step: 4

3x = 15

[Multiply.]

Step: 5

[Simplify.]

Step: 6

So, Josh has to pay $5 in order to buy 6 pizzas.

Correct Answer is : $5

Step: 1

Let n be the cost of 30 books.

Step: 2

[Write a possible proportion.]

Step: 3

6 × n = 30 × 4

[Write the cross products.]

Step: 4

6n = 120

[Multiply.]

Step: 5

[Divide both sides by 6.]

Step: 6

[Simplify.]

Step: 7

The cost of 30 books is $20.

Correct Answer is : $20

Step: 1

Let n be the number of dozens Jim bought.

Step: 2

[Write a proportion.]

Step: 3

4 × 24 = 16 × n

[Write the cross products.]

Step: 4

96 = 16n

[Multiply.]

Step: 5

[Divide both sides by 16.]

Step: 6

6 = n

Step: 7

Jim would get 6 dozens for $24.

Correct Answer is : 6 dozens

Step: 1

Let n be the cost of 27 pastries.

Step: 2

[Write a possible proportion.]

Step: 3

9 × n = 19 × 27

[Write the cross products.]

Step: 4

9 × n = 513

[Multiply.]

Step: 5

[Divide each side by 9.]

Step: 6

Step: 7

The cost of 27 pastries is $57.

Correct Answer is : $57

Step: 1

Cost of 3 pens = $27

Step: 2

Let x be the cost of 9 pens.

Step: 3

[Write the proportion.]

Step: 4

So, cost of 9 pens can be found using the proportion 3 2 7 = 9 x

Correct Answer is : 3 27 = 9 x

Step: 1

[Write a possible proportion.]

Step: 2

[Write the cross products.]

Step: 3

Step: 4

George will earn $48, if he works for 6 hours.

Correct Answer is : $48

Step: 1

If the unit price of an item is the lowest compared to others, then that item is said to be the best deal.

Step: 2

Unit price of one fl ounce of bottle = cos t n u m b e r

Step: 3

In case of '10 fl oz bottle for $65', the unit cost = 65 10 = $6.5

[Express as a ratio and simplify.]

Step: 4

In case of ' 2 fl oz bottle for $12', the unit cost = 12 2 = $6

[Express as a ratio and simplify.]

Step: 5

In case of '5 fl oz bottle for $25', the unit cost = 25 5 = $5

[Express as a ratio and simplify.]

Step: 6

In case of ' 3 fl oz bottle for $18 ', the unit cost = 18 3 = $6

[Express as a ratio and simplify.]

Step: 7

Therefore, '5 fl oz bottle for $25' is the best deal.

Correct Answer is : 5 fl oz bottle for $25

Step: 1

If the unit price of an item is the lowest compared to others, then that item is said to be the best deal.

Step: 2

Unit price of potatoes = P r i c e o f a l l t h e k g s o f p o t a t o e s N u m b e r o f t h e k g s o f p o t a t o e s

Step: 3

In case of 5kg for $20, the unit cost = 2 0 5 = $4

Step: 4

In case of 3kg for $15, the unit cost = 1 5 3 = $5

Step: 5

In case of 10kg for $30,the unit cost = 3 0 1 0 = $3

Step: 6

In case of 1kg for $5, the unit cost = 5 1 = $5

Step: 7

Therefore, 10 kg for $30 is the best deal.

Correct Answer is : 10 kg for $30

Step: 1

If the unit price of an item is the lowest compared to others, then that item is said to be the best deal.

Step: 2

Unit price of the ribbons = P r i c e o f a l l t h e y a r d s o f t h e r i b b o n s N u m b e r o f y a r d s

Step: 3

In case of '$7 per 1yd', the unit cost = 7 1 =$7

Step: 4

In case of '$12 per 2 yd', the unit cost = 1 2 2 = $6

Step: 5

In case of '$25 per 6yd', the unit cost = 2 5 6 = $4.16

Step: 6

In case of '$18 per 3yd', the unit cost = 1 8 3 = $6

Step: 7

Therefore, '$25per 6 yd' is the best deal.

Correct Answer is : $25 per 6 yd

Step: 1

Step: 2

Unit price of apple = P r i c e o f a l l d o z e n s o f a p p l e s n u m b e r o f d o z e n s

Step: 3

In case of '$165.2 for 25 dozens', the unit cost = 1 6 5 . 2 2 5 = $6.608

Step: 4

In case of '$33.95 for 7 dozens', the unit cost = 3 3 . 9 5 7 = $4.85

Step: 5

In case of '$30.56 for 5dozens', the unit cost = 3 0 . 5 6 5 = $6.112

Step: 6

In case of '$142.72 for 28 dozens', the unit cost = 1 4 2 . 7 2 2 8 = $5.09

Step: 7

Therefore, '$33.95 for 7 dozens' is the best deal.

Correct Answer is : $33.95 for 7 dozens

- Calculating Unit Rates-Gr 7-Solved Examples
- Applying Proportional Relationships-Gr 7-Solved Examples
- Equivalent Ratios Using Proportional Relationships-Gr 7-Solved Examples
- Using Graphs and Tables to represent Proportional Relationships-Gr 7-Solved Examples

- Proportion