1. If a person sells 12 pen for a rupee and he has a loss of 20%. How many pens he sell if he wants to make a profit of 20%.
2. A person spends 3/4 of his salary. Now his salary increased by 20% and his expenditure is increased by 10%. Find out the percentage increment in his savings?
3. X’s salary is 20% less of y. Now find out how much percent y’s salary is more than that of x’s salary.
4. How much percent the markup price of a product is greater than that of its cost price when a shopkeeper gives a discount of 10% and had a profit of 17%
5. Price of a commodity is increased by 20%. By what percentage the consumption of the commodity is decreased by the consumer, if the expenditure on this commodity remain constant.
6. The tank-full of petrol in Anil’s can lasts for 10 days. If he starts using 25% more every day. How many days will the tank full of petrol last?
7. In an examination out of 480 students, 85% of the girls and 70% of the boys passed. How many girls appeared in the examination, if total pass percentage was 75%.
8. An Alloy of Zinc and Iron weights 50gm. It contains 80% zinc. How much zinc should be added to the alloy, so that percentage of zinc is increased to 90?
9. The profit percentage of a product when it is sold for Rs. 1128 is equal to the loss percentage when the product is sold for Rs. 872. Find the cost price of the product.
10. If the price of a commodity is decreased by 10%, then it increases by 10%. Find out the final percentage change in the price of a commodity.