Important Theory / Shots Trick on Percentage
Section 1
Section 2
Section 3
Section 4
Section 5
Section 6
1. A sample of 50 litres of glycerine is found to be adulterated to the extent of 20%. How much pure glycerine should be added to it so as to bring down the percentage of impurity to 5% ?
2. A and B are two fixed points 5 cm apart and C is a point an AB such that AC is 3 cm. If the length of AC is increased by 6%, the length CB is decreased by :
3. What percentage of the whole week does Ajay spend in office, if his office hours are 9 am to 5 pm from Monday to Friday ?
4. A's salary was decreased by 50% and subsequently increased by 50%. How much percent does he lose ?
5. A man spend $$7\frac{1}{2}$$% of his money and after spending 75% of the remaining he had Rs. 370 left. How much money did he have :
6. A man spends a part of his monthly income and saves the rest. The ratio of his expenditure to the saving is 61 : 6. If his monthly income is Rs. 8710, the amount of his monthly savings is :
7. A number is increased by 15% and then decreased by 25% and the number becomes 22 less than the original number. The original number is :
8. What is the difference between 0.6 and 0.6% ?
9. A number is decreased by 10% and the resulting number is again decreased by 20%. What is the final percentage of decrease ?
10. In an office, 40% of the staff is female. 70% of the female staff and 50% of the male staff are married. The percentage of the unmarried staff in the office is :
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