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# Test 10 Review

### Percents

Term | Definition |
---|---|

Percent | a ratio that compares a number to 100 |

Percent Proportion | percent/100 = part/whole |

Percent Equation | part = percent (as decimal) x whole |

Discount/Sale | find discounted amount, then subtract from original price OR subtract discounted percent from 100% and solve to find price paid |

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 |

Tip | find tip, then add on to price OR add tip percent to 100% and solve to find TOTAL PRICE, including tip |

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 |

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. |

To Change a Percent to a Fraction... | write over 100 and simplify |

To Change a Percent to a Decimal | divide by 100 |

To Change a Fraction to a Decimal | divide the numerator (top) by the denominator (bottom) |

To Change a Fraction to a Percent | divide the numerator (top) by the denominator (bottom), then multiply by 100 |

To Change a Decimal to a Fraction | write the digits over the place value the number is written to, then simplify |

To Change a Decimal to a Percent | multiply by 100 |

Percent of Change | change (difference)/original(number that comes first) = percent/100 |

Simple Interest Formula | I = prt; I = interest, p = principal, t = time (in years) |

Created by:
Math7