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    proportion

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    1 If you drive 151.7miles on 8.2 gallons of gas, what is the simplified ratio of miles to gallons?

    2 Solve the proportion for the item represented by a letter:

    3 Solve the proportion for the item represented by a letter:

    4 If two quarts of paint are needed for 75 ft of fence, how many quarts are needed for 900 ft of fence?

    5 Estimate the percentages:

    a. 75% of 1,058 b. 75% of 94

    6 Write the sentence as a proportion, then solve to answer the question: 40% of what number is 60?

    7 If the sales tax is 5.5% and purchase price is $680, what is the amount of tax?

    8 If 20 is increased to 25, what is the percent increase?

    9 A certain test is worth 125 points. How many points (rounded to the nearest point) are needed to obtain a score of 75%?

    10 Calculate the amount of simple interest earned: $1,000 at 8% for 5 years

    (cont.)

    11 If $34,500 is invested at 6.9% for 30 years, find the future value if the interest is compounded:
    a. annually
    b. semiannually
    c. quarterly
    d. monthly
    e. daily
    f. every minute (N=525,600)
    g. continuously
    h. simple (not compounded)

    12 Find the cost of each item in 10 years, assuming an inflation rare of 5%:
    a. movie admission, $7.00
    b. CD, $14.95
    c. textbook, $90.00
    d. electric bill,$105
    e. phone bill, $45
    f. pair of shoes $85
    g. new suit, $570
    h. monthly rent, $800

    13 If Rita receives $45.33 interest for a deposit earning 3% simple interest for 240 days, what is the amount of her deposit.

    © BrainMass Inc. brainmass.com October 10, 2019, 12:46 am ad1c9bdddf
    https://brainmass.com/math/consumer-mathematics/ratios-percents-interests-problem-solving-306907

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    p.320 #10 If you drive 151.7miles on 8.2 gallons of gas, what is the simplified ratio of miles to gallons?

    Ratio = 151.7/8.2 = 1517/82 = 37/2

    p.320 #32 Solve the proportion for the item represented by a letter:

    Solution:

    Cross multiply

    4N = 3 ×
    4N = 3 ×
    4N = 8
    N = 8/4 = 2

    p.320 #34 Solve the proportion for the item represented by a letter:

    Which gives
    5 × = 2Q

    5 × = 2Q
    63 = 2Q
    Q = 63/2 =

    p.320 #46 If two quarts of paint are needed for 75 ft of fence, how many quarts are needed for 900 ft of fence?

    Let x be the number of quarts needed
    Proportion will be

    x/900 = 2/75
    75x = 900*2
    75x = 1800
    x = 1800/75 = 24 quarts

    Answer: 24 quarts

    p.330 #26 Estimate the percentages:

    a. 75% of 1,058

    Estimate 1058 t0 1000

    75% of 1000 = 750

    Answer: 750

    b. 75% of ...

    Solution Summary

    The expert solves proportion problems.

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