Percents

*******************PERCENTS********************
To change from:
1) a fraction 3/5 to a decimal ...
just divide 3/5 is .6
2) a decimal .6 back to a fraction ...
just read the decimal --- .6 is 6 tenths or is 6/10
3) a decimal .6 to a percent ...
just multiply by 100 --- .6 times 100 or 60%
4) a percent to a decimal ...
just divide by 100 ---- 7.45% becomes .0745
5) a Fraction to a Percent or Versa Visa
---we will not do this directly ---
change to a Decimal first and then proceed as before...
*******************PERCENTS********************

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***Change the given item into the form of the ANSWER***

***Change the given item into the form of the ANSWER***


***Change the given item into the form of the ANSWER***


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HINT: "WHOLE" usually appears after the word "OF".
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FIND the REQUIRED ITEM!****

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Working with Negative Numbers

Suppose each time a football team started on offense

they were at MID-FIELD. (Also assume that the

field is marked like a number line!)

Determine the position of the ball

after these sequences of plays:

Gain 10, Lose 5

The ball would rest on the 5 YARD LINE.

In math this would be represented by the

ADDITION PROBLEM:

(10) + (-5)  = 5

Thus, it seems that we are subtracting 10 minus 5.

And since the Gain is LARGER the ball is in the

POSITIVE DIRECTION

Try this set of plays starting at MID-FIELD:

Lose 30, Gain 20

ADDITION PROBLEM:

(-30) + (20) = -10
Again we subtract the numbers and the answer
has the sign of the LARGER  "-" (in size)

RULE:
When adding TWO numbers with
OPPOSITE SIGNS, subtract and
use the SIGN of the "LARGER"
(IN SIZE)

A review of PEMDAS might be in order before
attempting the following problems:

   

Simplify Arithmetic Expressions

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