Alicia buys a 5 pound bag of rocks for a fish tank. she uses 1 1/8 pounds of small fish bowl. how much is left?

There are 39/8 pounds or 4 7/8 pounds left 

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.