Math 035 Chap 7

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Author:
regishouse
ID:
112629
Filename:
Math 035 Chap 7
Updated:
2011-10-30 10:19:15
Tags:
math chap
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Description:
Math 035 chapter 7 quiz
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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%}

    be sure to add %

  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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