1. Sonika spent Rs. 45,760 on the interior decoration for her home, Rs. 27,896 on buying air conditioner, and the remaining 28% of the total amount she had as cash with her. What was the total amount?
2. Latika spends 45% of her monthly income on food and 30% of the monthly income on transport. The remaining amount of Rs. 4,500 she saves. What is her monthly income?
3. The price of a Maruti car rises by 30%, while the sales of the car come down by 20%. What is the percentage change in the total revenue?
4. The tax on a commodity is diminished by 20%, and its consumption increases by 15%. Find the effect on revenue.
5. If the tax on a commodity is reduced by 10%, and the total revenue remains unchanged, what is the percentage increase in its consumption?
6. If the price of petrol increases by 25%, and Kevin intends to spend only 15% more on petrol, by what percentage should he reduce the quantity of petrol that he buys?
7. If the length and breadth of a rectangle become half and double, respectively, what will be the net effect on the resultant area?
8. A man had Rs. 4,800 in his locker two years ago. In the first year, he deposited 20% of the amount in his locker. In the second year, he deposited 25% of the increased amount in his locker. Find the amount at present in his locker.
9. An exhibition was conducted for 4 weeks. The number of tickets sold increased by 20% in the 2nd week, increased by 16% in the 3rd week, but decreased by 20% in the 4th week. Find the number of tickets sold in the 1st week if 1,392 tickets were sold in the last week.
10. If the length of a rectangular field is increased by 20%, and the breadth is reduced by 20%, the area of the rectangle will be 192 m². What is the area of the original rectangle?
11. If the length of a rectangle increases by 20% while the breadth decreases by 20%, what is the percentage change in the area of the rectangle?
12. If the radius of a circle is increased by 20%, then the area is increased by:
13. Sujata scored 2240 marks in an examination that is 128 marks more than the minimum passing percentage of 64%. What is the percentage (approx.) of marks obtained by Meena if she scores 907 marks less than Sujata?
14. Prerna decided to donate 15% of her salary to an orphanage. On the day of donation, she changed her mind and donated Rs. 1896, which was 82% of what she decided earlier. How much is Prerna’s salary?
15. 405 sweets were distributed equally among children in such a way that the number of sweets received by each child is 20% of the total number of children. How many sweets did each child receive?