Ratios
Write the ratio as a fraction in simplest form: 8 to 30
4/15
410 km in 5 litres
82 km/litre
Are 16 points scored in 4 games equivalent to 48 points in 8 games?
No, 4 points per game is not equal to 6 points per game.
If 15 baseballs weigh 75 ounces, how many baseballs weigh 15 ounces?
3 baseballs.
What is the greatest common factor of 20 and 32?
Write the ratio in simplest form that compares 4 baseballs to 10 soccer balls.
2/5
1500 words in 25 minutes.
60 words per minute
Are 96 words typed in 3 minutes equivalent to 160 words typed in 5 minutes?
Yes, 32 words per minute is equal to 32 words per minute.
4 out of every 65 people who visit a store receive a free DVD. If 455 people visit the store, how many DVDs were given away?
28 DVDs
What is the least common multiple of 4 and 6?
12
Write the ratio as a fraction in simplest form: 66 inches to 72 inches
11/12
$220 for 5 grams. What is the unit rate?
$44 / gram
Are 15 computers for 45 students equivalent to 45 computers for 135 students? Explain your reasoning.
Yes, the fractions are equal, so the ratios are equivalent.
There are 57 ounces of dog biscuits in 5 boxes. At this rate, how many ounces of dog biscuits are in 8 boxes?
91.2 ounces
12
Write the ratio as a fraction is simplest form: 30 seconds to 5 minutes.
6 seconds to 1 minute
Which is the better buy? $45 for a 15 gram bag of candy or $25 for a 10 gram bag of candy?
$25 for 10 grams
Yes, 3 bottles for $1 equals 3 bottles for $1. The ratios are equivalent.
A bakery cooks 15 cakes in 3 hours. At this rate, how many cakes can they bake in 8 hours? At what rate are they baking these cakes?
40 cakes; 5 cakes per hour.
Use ratio tables on slide
4 adults
At a local store, 5 green cases, 6 silver cases, 3 red cases, and 4 black cases were sold. What is the ratio of black cases to the total number of cases sold?
2/9
Lisa bought 600 pencils for $150. How much would 900 pencils cost?
$225
You can buy 3 medium pizzas at The Pizza Place for $18 or 5 medium pizzas for $30. Are these selling rates equivalent? Explain your reasoning.
Yes, $6 per pizza is equal to $6 per pizza, the ratios are equivalent.
Nadia spent $28 on 2 DVDs. At this rate, how much would 5 DVDs cost? At what rate did she spend her money?
$70; $14 per DVD
Use ratio tables on slide
60 birds