Applications of Percentages

Q.

What is $30\%$ of $400$?

Q.

A restaurant prepares $22litres$ of a mixture that contains $25\%$ of orange essence and the remaining quantity as water. If $3litres$ of water is mixed in this mixture, what will be the percentage of orange essence in the new mixture? A) $34\%$ b) $4\%$ c) $12\%$ d) $22\%$

Q. What percentage of 300 is 45?

1. 15
2. 16
3. 17
4. 18

Q. A milk packet conatins 10% of water. What will be the quantity of milk if there is 250ml of water?

1. 2500 L
2. 2500 mL
3. 250 mL
4. 25000 mL

Q. William bought a refrigerator for $8000 and paid a sales tax of 7%. How much did he paid for 2 similar refrigerators?

1. $17120
2. $8560
3. $17, 020
4. $8, 565

Q. Robert bought 99 oranges from a shop. Later he found that 22 oranges are rotten. What percenatge of oranges are edible?

1. 77.78 %
2. 76 %
3. 22.22 %
4. 80 %

Q. The number 4 is increased by a% to 5. Then the obtained number 5 is decreased by b% to 4 . Which of the following is true for the relationship between a and b?

1. a > b
   
2. a < b
   
3. a = b
   

Q. Sam bought a pair of shoes at 25% discount. Selling price of shoes is $200. He has to pay tax of 5% on the discounted price. How much tax did Sam pay?

1. 5.5$
2. 6.5$
3. 7.5$
4. 8.5$

Q. What percentage of odd numbers are present in first 5 prime numbers?

1. 20%
2. 80%
3. 100%
4. 60%

Q.

Find the whole part percentage of a given number is:

$42\%is1050$