New Learning Composite Mathematics Class 7 SK Gupta Anubhuti Gangal Percentage and Its Applications Chapter 8C Solution

New Learning Composite Mathematics SK Gupta Anubhuti Gangal Class 7 Percentage and Its Applications Self Practice 8C Solution

(1) What percentage is:

(a) 7 of 70?
(b) 8 of 32?
(c) 19 of 25?
(d) 117 of 650?
(e) 180 of 300?
(f) 850 of 3400?
(g) 780 of 1950?
(h) 27 of 9?

(2) What percent is:

(a) 40 paise of Rs. 8
(b) Rs. 5.10 of Rs. 6?
(c) 400 ml of 1 L?
(d) 8.24 cm of 8 m?
(e) 6 s of 10 min?
(f) 18 h of 1 day?
(g) 900 kg of 1.5 tonne?

(3) 18 karat gold is a mixture of gold and another metal. 18 out of 24 parts are pure gold. Express the pure gold as a percentage of the the total.

Solution:

(4) A CD ROM has 700 megabytes of storage space. What per cent of the space is used by a file, that take up 154 megabytes?

(5) As per 2011 census, the population of Sikkim is 6,10,577 of which 3,23,070 are males. What percent of the total population of Sikkim are females? [You may use calculator for calculations].

Solution:


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