Percent of a Number

Chloe's Burgers cooks its burgers either well done or medium. The restaurant served 48 burgers last night, 50% of which were well done. How many well-done burgers did the restaurant serve?

(a)  

Answer explanation

50% as a decimal is 0.5. So you do 48 x .5 which equals 24.

Or 50% is half so you ask yourself what is half of 48 which is the same as dividing it by 2. 48 divided by 2 is 24.

50/100 = x/48

The state transportation commission counted cars traveling east and west across a toll bridge. 40% of the 100 cars counted were traveling east. How many eastbound cars did the commission count?

(a)  

Answer explanation

Anytime you are doing a percent of 100, the percent would be your answer.

An arborist examined trees in an orchard to see if they were infected with a virus. Out of 90 trees, 10% had the virus. How many trees were infected with the virus?

(a)  

Answer explanation

10% as a decimal is 0.1. So you do 90 x .1 which equals 9.

10/100 = x/90

A sports shop has 50 employees. 20% of the employees work part-time. How many part-time employees does the sports shop have?

(a)  

Answer explanation

20% as a decimal is 0.2. So you do 50 x .2 which equals 10

20/100 = x/50

In order to select new board members, the French club held an election. 70% of the 10 members of the club voted. How many members voted?

(a)  

Answer explanation

70% as a decimal is 0.7. So you do 10 x .7 which equals 7.

70/100 = x/10

40% of the tickets sold at a water park were child tickets. If the park sold 85 tickets in all, how many child tickets did it sell?

(a)  

Answer explanation

40% as a decimals is 0.4. So you do 85 x .4 which equals 34.

40/100 = x/85

Avery's Cafe offers two kinds of espresso: single-shot and double-shot. Yesterday afternoon, the cafe sold 5 espressos in all, 80% of which were single-shot. How many single-shot espressos did the cafe sell?

(a)  

Answer explanation

80% as a decimal is 0.8. So you do 5 x .8 which equals 4.

80/100 = x/5

The lunch choices last Friday were mushroom or pepperoni pizza. The cafeteria made 30 pizzas in all, 60% of which were mushroom pizzas. How many mushroom pizzas did the cafeteria make?

(a)  

Answer explanation

60% as a decimal is 0.6. So you do 30 x .6 which equals 18.

60/100 = x/30

Marcy's town had a recycling drive last weekend. 30% of the residents of the town participated. If there are 10,000 residents in Marcy's town, how many residents participated in the recycling drive?

(a)  

Answer explanation

30% as a decimals 0.3. So you do 10,000 x .3 which equals 3,000.

30/100 = x/10,000

Haley has a new beaded necklace. 25% of the 20 beads on Haley's necklace are blue. How many blue beads are there on Haley's necklace?

(a)  

Answer explanation

25% as a decimal is 0.25. So you do 20 x .25 which equals 5.

25/100 = x/20