Question

- X 75% x 4260
2
1 3
x 4260
2
75
75% =
100
3
1597.50
Practice EXERCISE 8.1
1. Find the ratio of:
(a) 5 to 50 paise (b) 5 m to 10 km (c) 30 days to 36 hours (d) 15 kg to 210 g
2. (a) Express 30 paise as a percentage of 1.
(b) Express 45 m as a percentage of a 1 km.
(c) Express 1 kg as a percentage of 800 g.
3. Express the first quantity as a percentage of the second :
(a) 45 m, 1 hr.
(b) 4 months, 1 year (c) 335 cm, 5 m (d) 60°, 360°
(e) 15 mm, 1 m (f) 63 paise, * 2.10
4. In a test, 30 of the 36 students obtained passing grades:
(i) What fraction of the students passed?
(ii) What percentage of the students passed?
5. During the economic downturn, a company retrenched 25 out of its 400 employees. What
percentage of employees was retrenched?
6. In a school, 120 students were asked which site they would like to visit as a picnic spot.
24 said Badkal Lake, Faridabad
36 said Cheetal, Khatauli.
54 said Shahasradhara, Dehradun
The rest said they would like to visit the Appu Ghar, New Delhi.
Write these results as percentages.
105​

Answer 1

Answer:

(a)10:1 (b)1:2000  (c)20:1 (d) 500:7

Step-by-step explanation:

(a)5 Rupees/50 paise = 5*100 paise/50 paise

=500/50= 1/10= 1:10

(b)5m/10 km=5m/10*100m=5m/1000m

=1/2000 = 1:2000

(c) 30 days/ 36 hours=30*24 hours/ 36 hours

=720/36 = 20/1 = 20:1

(d) 15kg/210g= 15*1000/210 = 15000/210

=500/7 = 500:7