Fractions, decimals, and percents are the three most common ways to give a mathematical description of parts of a whole object. *Fractions *are common in baking and carpentry when you're using English measurement units (such as cups, gallons, feet, and inches). *Decimals *are used with dollars and cents, the metric system, and in scientific notation. *Percents *are used in business when figuring profit and interest rates, as well as in statistics.

Use the following table as a handy guide when you need to make basic conversions among the three.

Fraction | Decimal | Percent |
---|---|---|

1/100 | 0.01 | 1% |

1/20 | 0.05 | 5% |

1/10 | 0.1 | 10% |

1/5 | 0.2 | 20% |

1/4 | 0.25 | 25% |

3/10 | 0.3 | 30% |

2/5 | 0.4 | 40% |

1/2 | 0.5 | 50% |

3/5 | 0.6 | 60% |

7/10 | 0.7 | 70% |

3/4 | 0.75 | 75% |

4/5 | 0.8 | 80% |

9/10 | 0.9 | 90% |

1 | 1.0 | 100% |

2 | 2.0 | 200% |

10 | 10.0 | 1,000% |