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Assalamualaikum,Wr.Wb

Kelompok 5Anggota :

Femilia Juniarheri gunawan

Sella Kusumawati YULIS NONI KARTIKA

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Rate is a quantify of one thing is

considered in relation to a unit another.

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Percentages The phrase per cent comes from the Latin per centuri which mean as per hundred.

A percentage is a ratio in which the second quantity is

always 100.is twenty-five per cent or 25%.72% is or 72 : 100.You can write any fraction as a percentage by changingthe denominator to 100.

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You can write anyfraction as a percentageby changing thedenominator to 100.

Example :(two fifth to change afraction into apercentage,if two fifth is

multiplied by onehundred per cent and theproduct is fourty percent)

To change a percentageinto a fraction, changethe % symbol into x andsimplify the fraction.

Example :5% = 5 x =(five per cent, simplitythe fraction,

if five is multiplied by oneper cent and the productis one twenty)

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Percentages of a given quantity

Examples : 5% of $600Change the percentage to fraction 5% xMultiply the fraction by the given number and

simplify5% of 600 =

Exercise : 20% of 150 m .?

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Writing one number as a percentage ofanotherTo write a given number as a percentage ofanother number, first write the given numberas a fraction of the other number. Multiply byand simplify.

Examples : Express 15 as a percentage of 45Write 15 as a fraction of 45 :Multiply by

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Profit and LossProfit is the amount of money made on the sale ofan article, or the amount of money made on theselling price that greater than cost price.Loss is the amount of money made on the cost pricethat greater than selling price.Percentage profit and lossPercentage profit =Percentage loss =

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Examples :

A shopkeeper buys an article for $500 and sells it for $600.What is the percentage profit? Answer : profit = selling price cost price

SP CP = $600 - $500 = $100Percentage profit = =

A person buys a car for $ 16 000 and sells it for $ 12 000.Calculate the percentage loss?

Answer : loss = cost price selling priceCP SP = $16 000 - $12 000 = $4 000Percentage profit = =

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DiscountDiscount is calculated as a percentage of theselling price, or actual price is lower than thegeneral price.Example : you are offered 10% discount on acar costing $ 20 000. How much would you pay?

Answer :10% is

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MeasurementConverting units of measurements In measurements lesson, later you need to change the unitsof a measurements. Example, you want to changekilometers to centimeter, or metre to millimeter. To changeto a bigger unit oyu have t divide. To change to a smallerunit, you have to multiply.Example :

Express 5 km in metres1 km = 1000 mSo 7 km = 7 x 1000 m

= 7000 m

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Money Working with money is the same as working with decimal fractions.,because most money amounts are given as decimals. Rememberthough, that when you work with money, you need to include theunits ($ or cents) in your answers.Foreign exchangeExamples :1. Convert 50 into Botswana pula given that 1 = 9.83 pula.

Answer : 1 = 9.83 pula50 = 9.83 pula x 50 = 491.50 pulaConvert $ 60 into rupiah given that $ 1 = Rp 11.000

Answer : $1 = Rp 11.000$60 = Rp 11.000 x 60 = Rp 660.000,00

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TimeThe clock dial on the left shows you the times from 1 to12 (a.m. and p.m times). The outside dial shows whatthe times after 12 p.m. are in the 24 hour system.

Always bear in mind that time is written in hours andminutes and that there are 60 minutes in an hour.Working with time intervalsExamples : 1. Farin and Sandy left home at 2.15 p.m.Farin returned at 2.50 p.m. and Sandy returned at 3.05p.m. How long was each person away from home?

Answer : Farin 2.50 2.15 = .35(Farin was away for 35 minutes)Sandy 3.05 2.15 = 2.65 2.15 =.50

(Sandy was away for 50 minutes)