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

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

(1) Increase:

(a) Rs. 50 by 20%
(b) Rs. 700 by 8%
(c) 600 g by 18%
(d) 4L by 15%
(e) 8 km by 19%
(f) 5 kg by 23%

(2) Decrease:

(a) Rs. 170 by 10%
(b) Rs. 2500 by 18%
(c) 1 ha by 28%
(d) 12 tonnes by 24~2/3% tonnes
(e) 24 m by 22%
(f) 480 g by 20%

(3) The entrance fee at a science museum is Rs. 50. Senior citizens receieve a 20% discount. How much fee does a senior citizen pay?

Solution No, 1, 2 & 3:

(4) What is the final price of a Rs. 4500 leather jacket that is on sale for 40% off?

(5) Increase Rs. 2000 by 10% and then decrease the new amount by 10%.

(6) Decrease Rs. 500 by 15% and then increase the result by 15%.

(7) Find the per cent increase for the following.

(a) original price = Rs. 800, new price = Rs. 872
(b) old income = Rs. 1,20,000, new income = Rs. 1,50,000

Solution No. 4, 5, 6 & 7:

(8) Find the percent decrease for the following.
(a) from 500 to 100
(b) original price = Rs. 300, new price = Rs. 270

(9) A property which was valued at Rs. 40,000 five years ago is now valued at Rs. 60,000. What is the percentage increase in value?

Solution No. 8 & 9:


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