MaTh HoMeWoRk 11/7

VoCaBuLaRy: Estimation: Is a way to find an approximate answer instead of an exact one

Review: understanding common percents

You can find many common percents mentally, without using a calculator. look at the equivalent fractions or numbers for the common percents listed below:

10%=10/100=1/10 100%=100/100=1

25%=25/100=1/2 200%=200/100=2

50%=50/100=1/2

What you should know

To find 10% of a number, move the decimal point one place to the left in the number

To find 25% of a number, divide the number by 4

To find 50% of a number, divide the number by 2

100% of a number is itself

to find 200% of a number, double the number

Try it 1:

approx.$ 14,000

Try it 2:

approx. $8

Try it 3: approx. 750 customers