R1 Ratios Introduction practice
Ratios are a comparison.  They may be written as afraction, with colons, or using the word to.  See examples below.

3/4
3:4
3 to 4.
Ratios need to be simplified.  Rates are ratios thatcompare unlike units like dollars per hour or milesper gallon.
 Simplify.
18 boys
12 boys
divide by 6
divide by 6

12 white roses

Simplify.

30 roses

  Simplify.

9 hours

3 people
 Simplify.

3 gallons

45 miles

Find the unit rate.  (How much for one.)

3 hours

$60

$

1 hour

Find the unit rate.  (How much for one.)

3 flowers

$7.50

$

1  flower

Find the unit rate.  (How much for one.)

10 hours

$80

$

1 hour

Find the unit rate.  (How much for one.)

3 gallons

45 miles

1 gallon

gallon

Solve the following proportions.

8 songs

1 cd

x by 6
x by 6

6 cd's

songs

Solve the following proportions.

3 tickets

Cross multiply $60 x 5 then divide by 3.

$60

$

5 tickets

Solve the following proportions.

2 hours

$60

$150

hours

Solve the following proportions.

     2.5

     8

15

A 4 liter bottle of laundry detergent costs $7.99.  A

6.5 liter bottle of laundry detergent costs $16.99.  

 Which one is the better buy?

To compare find out how much one liter of each costs.

4 liters fpr $7.99

6.5 liters for $16.99

A 2.2 lb. package of chicken  costs $5.99.  A 5.1 lb.

 package of chicken costs $9.95.  Which one is the

 better buy?

To compare find out how much does one pound of each
cost.

2.2 lb. for $5.99

5.1 lb. of $9.95

Aryana made 12 pairs of earrings in 2 hours.  How many

pairs of earrings could she make in 3 hours?

How many pairs of earrings can she make in 3 hours?
How many pairs of earrings can she make in one hour?
pairs
pairs
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