# Math 035 Chap 7

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1. Percent as decimal
• move decimal to the left
• {ex. 0.026 = 0.0026}
• move from right to left if number has no decimal
• {ex. 526% = 5.26}

• drop decimal
2. Decimal to percent
• move decimal right
• {ex. 0.954 = 95.4%}

• move decimal from left to right if number has no decimal
• {ex. 705 = 70,5000%}

• any additional zeros can be dropped
• {ex. 0.0063 = 0.63%}

3. Percent as a fraction or mixed number
• make percent a fraction over 100
• {ex. 15% = 15/100}

• Simplify fraction is possible
• {ex. 15% = 15/100[divide both sides by 5] = 3/20}

• if percent is converted and fraction is improper, convert fraction to a mixed fraction and simplfy if possible
• {ex. 725% = 725/100= 7 25/100 {divide both sides by 25] = 7 1/4}

• if percent is a decimal, move decimal but add same number of zeros in demominator
• {ex. 1.45% = 1.45/100 = 145/10000 [divide both sides by 5] = 29/2000}
4. Fraction to percent
• use long division then convert decimal to percent ( moving to right)
• {ex. 6/25 = 25/6(divide) = 0.24(move decimal) = 24%}

5. Solving Equation
is/of = %/100
6. Simple Interest
I = p*r*t

• p = principle
• r = rate of interest ( decimal)
• t = time in years
• I = interest
7. Tax
• tax = taxrate * subtotal (decimal)
• subtotal = cost + tax
8. Commission
commission = total sales * commission rate (decimal)
9. Discount
• discount = price * discount rate (decimal)
• sales price = original price - discount

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 Author: regishouse ID: 112629 Filename: Math 035 Chap 7 Updated: 2011-10-30 14:19:15 Tags: math chap Folders: Description: Math 035 chapter 7 quiz Show Answers:

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