Percents
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Percent | a ratio that compares a number to 100
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| Percent Proportion | percent/100 = part/whole
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| Percent Equation | part = percent (as decimal) x whole
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| Discount/Sale | find discounted amount, then subtract from original price OR subtract discounted percent from 100% and solve to find price paid
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| Sales Tax | find sales tax, then add on to original price OR add sales tax percent to 100% and solve to find TOTAL PRICE, including tax
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| Tip | find tip, then add on to price OR add tip percent to 100% and solve to find TOTAL PRICE, including tip
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| Commission | money earned by sales people, which is calculated as a percentage of the total sales; find the commission by finding the commission percent of the total sales
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| Mark Up | the percentage a seller adds on to the wholesale price of an item in order to sell it and make a profit; add the markup percent to 100% and solve to find the selling price.
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| To Change a Percent to a Fraction... | write over 100 and simplify
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| To Change a Percent to a Decimal | divide by 100
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| To Change a Fraction to a Decimal | divide the numerator (top) by the denominator (bottom)
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| To Change a Fraction to a Percent | divide the numerator (top) by the denominator (bottom), then multiply by 100
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| To Change a Decimal to a Fraction | write the digits over the place value the number is written to, then simplify
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| To Change a Decimal to a Percent | multiply by 100
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| Percent of Change | change (difference)/original(number that comes first) = percent/100
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| Simple Interest Formula | I = prt; I = interest, p = principal, t = time (in years)
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Created by:
Math7
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