Percentages are ratios of an amount compared to 100. The percent change of an old to new value is equal to 100% x \({ new - old \over old }\).

The total water usage for a city is 5,000 gallons each day. Of that total, 12% is for personal use and 34% is for industrial use. How many more gallons of water each day is consumed for industrial use over personal use?

6,750 | |

4,800 | |

1,100 | |

4,600 |