Class Notes

*HOW TO FIND THE PERCENT OF A NUMBER

STEP 1: Locate the decimal point in the percent. If there is no decimal point add one to the end of the number

          Ex: 34% ⇒ 34.% or 345% ⇒ 345.%

STEP 2: Change the percent into a decimal by moving the decimal point two places to the left. If necessary use zeros as placeholders. 

         EX: 34.% ⇒.34 or 345.% ⇒ 3.45

STEP 3: Multiply the decimal by the number

*EXAMPLE OF HOW TO FIND THE PERCENT OF A NUMBER

What is the 5.9% of 45?

5.9% ⇒ .059 x 45 = 2.655


*HOW TO FIND MARKUPS/ SALES TAX/ TIP

STEP 1: Locate the decimal point in the percent. If there is no decimal point add one to the end of the number

          Ex: 34% ⇒ 34.% or 345% ⇒ 345.%

STEP 2: Change the percent into a decimal by moving the decimal point two places to the left. If necessary use zeros as placeholders. 

         EX: 34.% ⇒.34 or 345.% ⇒ 3.45

STEP 3: Multiply the decimal by the original price

STEP 4: If it is a markup, sales tax, or tip, ADD the original price and the product(answer) from step 3. If it is a markdown or discount, SUBTRACT the original price from the product(answer) from step 3.

*EXAMPLE OF HOW TO FIND THE MARKUP OF  NUMBER

A shoe store uses a 40% markup on the original price of items. Find the cost of a pair of shoes that originally cost $63.

Step 1: 40% = 40.% (I added a decimal point)

Step 2: 0.40 (I moved the decimal point over two places to the left)

Step 3: 0.40 x 63 = $25.20 (I multiplied to figure out how much the shoes will be marked up)

Step 4: $63 + $25.20 = $88.20 (I added the original price and the amount of the markup to find the retail price of the shoes or the selling price)

 

*EXAMPLE OF HOW TO FIND THE MARKDOWN OF  NUMBER

A shoe store is discounting its shoes 33% off for its holiday sale.  Find the cost of a pair of shoes that originally cost $63.

Step 1: 33% = 33.% (I added a decimal point)

Step 2: 0.33 (I moved the decimal point over two places to the left)

Step 3: 0.33 x 63 = $20.79 (I multiplied to figure out how much money the shoes will be discounted)

Step 4: $63 - $20.79 = 42.21  (I subtracted the original price and the amount of the discount to find the retail price of the shoes or the selling price)

 

 

 

Joyce Greene

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