The plumber would need a piece of pipe at least 25^1724 inches long.
EXAMPLE
It takes Bill 2^34 hours to cut a lawn. It takes Walter 3^18 hours to cut the same
lawn. How much faster is Bill?
SOLUTION
Since we are looking for a difference, we subtract:
318 ¼ 318 ¼ (^298)
234 ¼ 268 ¼ (^268)
3
8
It takes Bill^38 of an hour less to cut the lawn.
EXAMPLE
How much will a trip of 212 miles cost if the allowance is 27^34 cents
per mile?
SOLUTION
Multiply:
212 2734 ¼
212
1
111
4
53
¼
212
1
111
4
¼ 53 111
¼5883 cents
To change cents to dollars, divide by 100.
5883 100 ¼$ 58 : 83
Hence the allowance for the trip is $58.83.
EXAMPLE
How many cubic feet will a 240-gallon tank hold if one cubic foot of water is
about 7^12 gallons?
72 CHAPTER 4 Fractions: Part 2