M l aggarwal understanding icse mathematics class 7 Solutions for Chapter 6 ratio and proportion

Convert the following percents into fractions in simplest form:

(i) 25%

(ii) 150%

(iii) 7½%

(iv) 33\frac{1}{3}\%

Express the following ratios in simplest form: (i) (1 / 6): (1 / 9) (ii)4\frac{1}{2}:1\frac{1}{8}
(iii) (1 / 5): (1 / 10): (1 / 15)

Find the ratio of each of the following in simplest form: (i) Rs 5 to 50 paise (ii) 3 km to 300 m (iii) 9 m to 27 cm (iv) 15 kg to 210 g (v) 25 minutes to 1.5 hours (vi) 30 days to 36 hours

Which of the following statements are true? (i) 2.5: 1.5:: 7.0: 4.2 (ii) (1 / 2): (1 / 3) = (1 / 3): (1 / 4) (iii) 24 men: 16 men = 33 horses: 22 horses.

Check whether the following numbers are in proportion or not: (i) 18, 10, 9, 5 (ii) 3,3\frac{1}{2},4,4\frac{1}{2}

(iii) 0.1, 0.2, 0.3, 0.6

Convert the following percentages into ratios in simplest form: (i) 14%

(ii) 7/4%

(iii) 100/3%

(iv) 37.5%

6 bowls cost Rs 90. What would be the cost of 10 such bowls?

Express the following ratios as percentages: (i) 5: 4

(ii) 1: 1

(iii) 2: 3 (iv) 9: 16

Ten pencils cost Rs 15. How many pencils can be bought with Rs 72?

Convert the following speeds into m/sec: (i) 72 km/h (ii) 9 km/h (iii) 1.2 km/minutes (iv) 600 m/hour