Estimation Using Percentages in Situations

Q.

A picnic spot is $55$km away from a school. The first stop is taken at $22$km from the school. What percentage of the distance is remaining to reach the destination?

1. 40%
2. 80%
3. 20%
4. 60%

Q.

$Thetablebelowshowsthenumberofchildrenwithdifferentheights.$$$\begin{array}{ccccc}Height& 110cm& 120cm& 130cm& 140cm\\ Noofchildren& \text{22}& \text{25}& \text{21}& \text{32}\end{array}$$

What is the percentage of students whose height is more than 125 cm?

___

Q.

In a class of 25 students, there are 15 boys. What is the percentage of girls in this class?

1. 40%

2. 80%

3. 20%

4. 50%

Q. The population of a city is 155625, for every 1000 men, there are 1075 women.If $40\%$ of men and $24\%$ of women be literate, then what is the percentage of literate people in the city?

1. $30\%$
2. $32\%$
3. $32\frac{10}{15}\%$
4. $31\frac{59}{83}\%$

Q. A large watermelon weighs 20 kg and 96% of its weight is water. When it is kept in the sun, due to evaporation of water, it was observed that now, 95% of its weight is water. What is the reduced weight of the watermelon?

1. 17 kg
2. 18 kg
3. 16 kg
4. 16.5 kg

Q.

The price of cooking oil has increased by $25\%$. The percentage of reduction that a family should effect in the use of cooking oil so as not to increase the expenditure on this account is:

1. 15%

2. 20%

3. 25%

4. 30%

Q.

A mixture of 70 litres of juice and water contains $10\%$ of water. How much water must be added to make the water content $12.5\%$ of the resulting mixture?

1. 1 L

2. 2 L

3. 3 L

4. 4 L

Q.

If the price of milk increases from ₹ $24$ per litre to ₹ $32.40$ per litre, then what is the percentage increase in the price?

1. 25%

2. 15%

3. 35%

4. 45%

Q.

The price of a car increased by $5\%$. If the new price is ₹$22,050$, then what was the old price?

1. ₹ $21,000$

2. ₹ $23,152.50$

3. ₹ $20,000$

4. ₹ $23,210.53$

Q. If 20 is decreased by 50%, we get .

1. 12
2. 15
3. 10