Hey guys can you give me answers to these problems on Percent?

Question

Solve the percent problem.
7.) 35 is what percent of 20?
8.) 12% of 5 is what number?
9.) 18 is 25% of what number?
10.) 24 is 120% of what number?

The Price of a book without tax is $10.The sales tax rate on the price of the book is 6%.
11.) Model the situation with an equation a=p/100b.
12.) Solve the equation to find the amount of the tax.
Solve the percent problem.
16.) How much money is 35% of $750?
17.) What number is 25% of 80?
18.) What distance is 24% of 710 miles?
19.) 14% of 220 feet is what length?
20.) How much money is 8% of 800 tons?
21.) What number os 200% of 5?

Answer 1

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Answer 2

To figure out percentages of numbers, use this ratio equation (it works every time):

Partial number / Whole number = Percentage / 100%

For example, if you want to know what is 13% of 50 (or X out of 50, equals 13% out of 100%), then:

X / 50 = 13% / 100%

To solve, multiply the Top left numerator with the Bottom right denominator, and the Bottom left denominator with the Top right numerator, like this:

100 * X = 13 * 50 ----> 100X = 650

(Solve for X)
X = 650 / 100 ----> X = 6.5

Now try it with your problems.

7.) 35 is X% of 20? (Replace what with x)

35 / 20 = X% / 100% -------> 35 * 100 = 20 * X

3500 = 20X ------> 3500 / 20 = X

X = 175%

Answer 3

you need to learn how... lets see now,....
7) its saying what do you need to multiply 20 by to get 35... so its probably 175% to check, you do 1.75 (which is the decimal moved 2 times to get decimal form) times 20 and then u get 35... right?

8) thats easy... 5 times .12 = _____ (im lazy)

9) 18 IS 25%, so multiply it by 4 (18 times 4)

10) do.. 24 over x =120 over 100. cross multiply and you get 120x = 2400 divde by 120 and you get 20.

11) i dont get what the question is asking

12) 10 times .06

16) .35 times 750

17) easy! answer's 20

18) .24 times 710

19) .14 times 220

20) .08 times 800

21) 10