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- 206
- àï5.5èApplications of Percent.
-
- äèPlease solve the following Percent Applications.
-
- âè How much interest will you earn on an investment of $2500 at
- a 12% rate.
- #êêê┌¥ë 100 ∙ Aè=è12 ∙ 2500
- #è Aêï12ë│ê100 ∙ Aè=è30,000
- #ï────è=è───ï,ï│êë Aè=è30,000/100
- #ï2500ê100è──┘êë Aè=è300
- êêêê You will earn $300 interest.
- éSTo solve the Percent Problem, "How much interest will you earn
- on an investment of $2500 at a 12% rate?", you should first identify
- the three parts.
- êêë interestêï12%êï2500
- êêêïêêêë
- êêêAmountêïRateêèBase
- Then you should substitute ç parts into the Percent Proportion and
- solve.ë AmountêRate
- #êë──────è=è────ë┌¥è 100 ∙ Aè=è12 ∙ 2500
- #êë Baseêï100ë│
- #êêêêë │ë100 ∙ Aè=è30,000
- #êê Aêï12ê│êè Aè=è30,000/100
- #êë ────è=è───ë──┘êè Aè=è300
- êë 2500ê100êèThe earned interest will be $300.
- 1
- êèHow much interest will you earn on $5,000 invested at 11%?
-
-
- ëA)ï$650êèB)ï$550êèC)ï$600êèD)ïå
-
- üêêêèAêï11
- #êêêê────è=è───
- êêêê5000ê100
- êêêè 100 ∙ Aè=è11 ∙ 5000
- êêêè 100 ∙ Aè=è55000
- êêêêèAè=è55000/100
- êêêêèAè=è550
- êêê The earned interest will be $550.
- Ç B
- 2
- êèIf you deduct 15% of your $400 salary for savings, how much
- êèwill you set aside?
-
- ëA)ï$60êè B)ï$45êè C)ï$50êè D)ïå
-
- üêêêèAêï15
- #êêêê────è=è───
- êêêê 400ê100
- êêêè 100 ∙ Aè=è15 ∙ 400
- êêêè 100 ∙ Aè=è6000
- êêêêèAè=è6000/100
- êêêêèAè=è60
- êêê The amount deducted will be $60.
- Ç A
- 3
- êèHow much commission will you get if your rate is 6% and you
- êèsell an $80,000 home?
-
- ëA)ï$2,800ê B)ï$3,600ê C)ï$4,800ê D)ïå
-
- üêêêèAêè6
- #êêêê────è=è───
- êêêë80,000ê100
- êêêè 100 ∙ Aè=è6 ∙ 80,000
- êêêè 100 ∙ Aè=è480,000
- êêêêèAè=è480,000/100
- êêêêèAè=è4,800
- êêê The commission will be $4,800.
- Ç C
- 4
- êèIf 20% of a 10 lb. mixture of nuts is walnuts, how many pounds
- êèare walnuts?
-
- ëA)ï2 lbs.ê B)ï3 lbs.ê C)ï4 lbs.ê D)ïå
-
- üêêêè Aê 20
- #êêêêï──è=è───
- êêêêï10ê100
- êêêè 100 ∙ Aè=è20 ∙ 10
- êêêè 100 ∙ Aè=è200
- êêêêèAè=è200/100
- êêêêèAè=è2
- êêê There are 2 lbs. of walnuts.
- Ç A
- 5
- êèIf the state sales tax rate is 6%, and the sales tax on an
- êèitem is $8.40, what was the price?
-
- ëA)ï$125êèB)ï$135êèC)ï$140êèD)ïå
-
- üêêê 8.40êï6
- #êêêê────è=è───
- êêêêïBê 100
- êêê 8.40 ∙ 100è=è6 ∙ B
- êêêê 840è=è6 ∙ B
- êêêë 840/6è=èB
- êêêê 140è=èB
- êêêëThe price was $140.
- Ç C
- 6
- êèIf you pay $300 yearly interest on a 6% loan, how much money
- êèwas borrowed?
-
- ëA)ï$5,000ê B)ï$6,000ê C)ï$8,000ê D)ïå
-
- üêêêï300êï6
- #êêêê────è=è───
- êêêêïBê 100
- êêêï300 ∙ 100è=è6 ∙ B
- êêêë 30000è=è6 ∙ B
- êêêè 30000/6è=èB
- êêêë 5,000è=èB
- êêê The amount borrowed was $5,000.
- Ç A
- 7
- êèIf you are paid 5% commission of your sales, how much must you
- êèsell to earn $2,000.
-
- ëA)ï$20,000êB)ï$40,000êC)ï$30,000êD)ïå
-
- üêêê2,000êï5
- #êêêë ─────è=è───
- êêêêïBê 100
- êêê2,000 ∙ 100è=è5 ∙ B
- êêêè 200,000è=è5 ∙ B
- êêêï200,000/5è=èB
- êêêë40,000è=èB
- êêê You must sell $40,000.
- Ç B
- 8
- êêêï240 is 12% of what number?
-
-
- ëA)ï2,500êïB)ï3,000êïC)ï2,000êïD)ïå
-
- üêêêï240ê 12
- #êêêê ───è=è───
- êêêêïBê 100
- êêêï240 ∙ 100è=è12 ∙ B
- êêêë24,000è=è12 ∙ B
- êêêï24,000/12è=èB
- êêêë 2,000è=èB
- êêêèThe number is 2,000.
- Ç C
- 9
- êèIf 27 out of 30 people finish a math course, what is the
- êècompletion rate?
-
- ëA)ï85%êè B)ï90%êè C)ï95%êè D)ïå
-
- üêêêè27ê R
- #êêêêï──è=è───
- êêêêï30ê100
- êêêè27 ∙ 100è=è30 ∙ R
- êêêê2700è=è30 ∙ R
- êêêè 2700/30è=èR
- êêêêï90è=èR
- êêêï90% of the people finished.
- Ç B
- 10
- êèIf you were charged $18.00 interest on a $1200 credit card
- êèbalance, what was the monthly interest rate?
-
- ëA)ï1.5%êèB)ï12%êè C)ï15%êè D)ïå
-
- üêêêè18ê R
- #êêêê────è=è───
- êêêê1200ê100
- êêêè18 ∙ 100è=è1200 ∙ R
- êêêê1800è=è1200 ∙ R
- êêêï1800/1200è=èR
- êêêê 1.5è=èR
- êêêïThe monthly rate is 1.5%.
- Ç A
- 11
- êèIf you earn $135 interest on a $1500 investment, what is the
- êèrate?
-
- ëA)ï7%êèB)ï11%êè C)ï9%êè D)ïå
-
- üêêêï135ê R
- #êêêê────è=è───
- êêêê1500ê100
- êêêï135 ∙ 100è=è1500 ∙ R
- êêêë 13500è=è1500 ∙ R
- êêê 13500/1500è=èR
- êêêêè9è=èR
- êêêïThe earnings rate is 9%.
- Ç C
- 12
- êèIf you have 88 dimes in an 800 coin collection, what percent
- êèof coins are dimes?
-
- ëA)ï12%êèB)ï11%êè C)ï8%êè D)ïå
-
- üêêêè88ê R
- #êêêê ───è=è───
- êêêê 800ê100
- êêêè88 ∙ 100è=è800 ∙ R
- êêêë 8,800è=è800 ∙ R
- êêêï8,800/800è=èR
- êêêêï11è=èR
- êêêï11% of the coins are dimes.
- Ç B
-
-