ratio revision
When working with ratio remember to :
simplify as much as possible
a ratio in it's simplest form can also be expressed as portions by changing the whole numbers in the ratio into fractions with the same denominator
and
a garden is divided into lawn and shrubs in the ratio 3:2
also make sure you are working with common units
125g to 2kg
1m to 4km
1cm to 4km
what fraction of the garden is covered by
lawn?
what fraction of the garden is covered by
shrubs?
ratio revision
Divide 63cm in the ratio 3 : 4
Proportion
If 9 litres of petrol costs £5.76, find the cost of 20 litres.
If eight pens cost £2.64, what is the cost of five pens?
Proportion
If 5 men can paint a bridge in 12 days, how long would it take three men?
Eight loaves of bread will make packed lunches for 18 people. How many packed lunches can be made from 20 loaves?
ratio revision
ratio revision
1)
2)
3)
9)
4)
10)
5)
11)
6)
7)
8)
12)
13)
14)
You wait in line for 1½ hours to ride a rollercoaster.
The ride lasts 2 minutes.
What is the ratio of time spent in line to time spent
on the ride?
ratio revision
There are 26 girls, 21 boys and 7 counselors at
summer camp.
What is the ratio of girls to boys?
What is the ratio of students to counselors?
You drive 3¾ hours for a
45 minute meeting.
Find the ratio of driving
time to meeting time.
Heather owns 27 hats; 9 are red. Kyle owns 18 hats; 10 are red.
Who has the greater ratio of
red hats to total hats?
Luis
Ana
rock
9
28
hip­hop
16
40
pop
24
70
According to the table, who has the greater ratio of rock CDs to pop CDs?
1)Simplify the fraction
45
80
1) 176 = w
11
33
2) complete the statement with < = >
20:75
18:63
3) k = 8
3)find the value of x that makes the ratio true
x to 12, 6 to 9
5)
4)It takes a car 3 hours to travel 150miles. What is the average speed?
5)It takes 4 students 15 minutes to build a 2 foot tower made of paper.
How long will it take 5 students?
20
6)
7)
10
8 = w
24
30
2) 20 = x 30
42
4) k = 12
30
20