New Page - Ratios
I don't want to spoil the surprise, but you're going to need your calculator for this bit — get your finger on that fraction button...
RATIOS are like FRACTIONS which are like DECIMALS
We can treat the RATIO 3:4 like the FRACTION 3/4, which is 0.75 as a DECIMAL.1
Watch out though — this isn't 3/4 of the total:
If there are girls and boys in the ratio 3:4,
it means there's 3/4 as many girls as boys.
So if there's 8 boys, there's 3/4 x 8 = 6 girls.
Write these ratios in their simplest forms:
e) 2 weeks:4 days
A rectangle has sides in the ratio 1:2. Calculate the length of the longer side if the shorter side is: a) 3 cm b) 5.5 cm c) 15.2 m Calculate the length of the shorter side if the longer side is: d) 3 cm e) 5.5 cm f) 15.2 m
Divide the following amounts in the ratios given:
a) £20 in the ratio 2:3
c) 500 g in the ratio 1:2:2
b) 150 m in the ratio 8:7
d) 8 hrs in the ratio 1:2:3
a) Increase £3.20 in the ratio 2:3.
b) Decrease 120 cm in the ratio 3:2.
For these you add up the ratio = numbers to find the total number of =1 = parts and divide by this.
Then multiply—by each number in the ratio separately= to find the different amounts.
John and Peter share a bar of chocolate marked into 16 squares.
They share it in the ratio 1:3 respectively. How many squares does each boy get?
Tony gives £100 to be shared by Jane, Holly and Rosemary in a ratio according to their age.
Jane is 10, Holly is 12 and Rosemary is 3 years old. How much will each child get?
et -1 A 2 litre bottle of cola is to be shared between three girls in the ratio 2:3:5.
How many milli-litres will each girl get?
1 1 Watch out for your units — you'll have to change them over - for this one — and your answer should be in milli-litres.
I I II 1 3 I 111,11 I 1 s Illy,
Oak and ash saplings are planted along a roadside in the ratio 2:3 respectively.
If there are 20 oak saplings, how many ash saplings are there?
Sunil and Paul work in a restaurant.
As they work different hours, they split their tips in the ratio 3:4.
One night they got f28 in tips between them.
Who got the most money from the tips and how much did they get?