Practice the questions given in the worksheet on concept of ratio. We know, the quantities of a ratio must be in the same kind and is usually expressed in its lowest term in simplest form.
1. Find the ratio of the following in the simplest form:
(i) 15 cents to 5 dollars (ii) 50 g to 1.5 kg
(iii) 25 cents to $75 (iv) 40 cm to 2.5 m (v) 45 seconds to 2 minutes (vi) 75 cents to $10 
(vii) 15 minutes to an hour (viii) 2 cm to 1 metre
(ix) 250 gm to 1 kilogram (x) 15 cents to 1 dollar (xi) 3.5 metres to 15 metres (xii) 10 metres to 25 cm 
2. Fill in the blanks: (i) 27 : ____ = 9 : 19 (ii) 14 : 16 = ____ : 8
(iii) ____ : 2 = 5 : 10 
(iv) 6 : 4 = ____ : 16 (v) 4 : 6 = 2 : ____
(vi) 6 : 7 = ____ : 35 
3. In a packet containing 80 watches, 15 watches were found to be defective. Find the ratio of defective to good watches.
4. A rectangular field is 100 m by 80 m. Find the ratio of:
(i) length to its breadth
(ii) breadth to its perimeter.
5. The monthly salary of a person is $12,000 and his monthly expenditure id $8,500. Find the ratio between his:
(i) salary and expenditure.
(ii) expenditure and savings.
(iii) savings and salary.
6. There are 28 boys and 36 girls in a party. Find the ratio of:
(i) boys to girls
(ii) boys to total number of children
(iii) girls to total number of children
Answers for the worksheet on concept of ratio are given below to check the exact answers of the above simple questions on ratio.
Answers:
1. (i) 3 : 100 (ii) 1 : 30 (iii) 1 : 300
(iv) 4 : 25 (v) 3: 8 (vi) 3 : 40 
(vii) 1 : 4 (viii) 1 : 50
(ix) 1 : 4 (x) 3 : 20 (xi) 7 : 30 (xii) 40 : 1 
2. (i) 57 (ii) 7 (iii) 1 
(iv) 24 (v) 3
(vi) 30 
3. 3 : 13
4. (i) 5 : 4
(ii) 2 : 9
5. (i) 24 : 17
(ii) 17 : 7
(iii) 7 : 24
6. (i) 7 : 9
(ii) 7 : 16
(iii) 9 : 16
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