**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:**