Question : The ratio between monthly income and expenditure of Vaidic is 8 : 5. If his income increases by 20% and his expenditure increases by 30%, then find the percentage increase or decrease in his monthly savings.

Option 1: $5 \frac{2}{3}$% increase

Option 2: $5 \frac{2}{3}$% decrease

Option 3: $3 \frac{1}{3}$% increase

Option 4: $3 \frac{1}{3}$% decrease

Question : The percentage change in a number when it is first decreased by 10% and then increased by 10% is:

Option 1: 0.1% increase

Option 2: 1% decrease

Option 3: 0.1% decrease

Option 4: No changes

Question : The cost of apples is increased by 20% and then decreased by 20%. What is the net percentage decrease?

Option 1: 4%

Option 2: 3%

Option 3: 5%

Option 4: 6%

Question : The length and breadth of a cuboid are increased by 20% and 25%, respectively, while its height is reduced by 30%. What must be the total percentage increase/decrease in the volume of the cuboid?

Option 1: Increase by 5%

Option 2: Increase by 3%

Option 3: Decrease by 2%

Option 4: Decrease by 4%

Question : In the first month, the income of Mohan increased by 30%. In the second month, his income decreased by 30%. What will be the percentage increase or decrease in the income after two months?

Option 1: 15% increase

Option 2: 9% increase

Option 3: 15% decrease

Option 4: 9% decrease