7.RP.3 Percents & Scale Factor

10 is what percent of 80?

The number 10 is the:

• part

• percent

• whole

• equation

Answer explanation

In the question, 10 is the part of the whole, which is 80. To find what percent 10 is of 80, we identify 10 as the part of the total amount (80). Therefore, the correct answer is 'part'.

Tags

CCSS.7.RP.A.2

CCSS.7.RP.A.3

What is 40% of 60?
40% is the:

• part

• percent

• whole

• equation

Answer explanation

40% of 60 means we are looking for a part of the whole (60). Here, 40% is the percent that indicates how much of the whole we are considering. Therefore, the correct answer is 'percent'.

Tags

CCSS.7.RP.A.2

CCSS.7.RP.A.3

What is 25% of 17?
The number 17 is the:

• part

• percent

• whole

• equation

Answer explanation

In the question, 17 represents the whole amount from which we are calculating 25%. The term 'whole' refers to the total quantity, making 'whole' the correct choice.

Tags

CCSS.7.NS.A.2

CCSS.7.RP.A.2

CCSS.7.RP.A.3

24 students in a class took an algebra test. If 18 students passed the test, what percent passed?

Answer explanation

To find the percentage of students who passed, divide the number of students who passed (18) by the total number of students (24) and multiply by 100. (18/24) * 100 = 75%. Therefore, 75% of the students passed.

30% of $40 is?

Answer explanation

To find 30% of $40, multiply 40 by 0.30, which equals $12. The correct answer is $12.

You scored a 95% on your math quiz. The quiz was out of 60 points. How many points did you get?

Answer explanation

To find the points scored, calculate 95% of 60. This is done by multiplying 60 by 0.95, which equals 57. Therefore, you scored 57 points on the quiz.

If a watch costs $40 and you must pay 6.5% sales tax, how much will the tax be?

Answer explanation

To calculate the sales tax, multiply the cost of the watch ($40) by the sales tax rate (6.5%). The tax is $40 * 0.065 = $2.60. The correct answer is $2.60, which is the same as 2.60.

Write the decimal as a percent. .065

Answer explanation

.065 as a percent is found by multiplying by 100, resulting in 6.5%. Therefore, the correct answer is 6.5%.

Charlie bought a pair of shorts at the store when they were having a 45% off sale. If the regular price of the pair of shorts was $24, how much did Charlie pay?

Answer explanation

To find the sale price, calculate 45% of $24: 0.45 * 24 = $10.80. Subtract this from the original price: 24 - 10.80 = $13.20. Charlie paid $13.20, which matches the answer choice '13.20'.

A television that normally sells for $459 is on sale at a 30% discount. What is the sale price of the television?

Answer explanation

To find the sale price, calculate 30% of $459: 0.30 * 459 = $137.70. Subtract this from the original price: 459 - 137.70 = $321.30. Thus, the sale price is $321.30.