Question

A piece of pipe is 303/4 inches long. If five pieces, each 41/3 inches long, are cut from the pipe, how many inches of pipe remain?
A. 9 3/4 inches
B. 26 3/4 inches
C. 26 5/12 inches
D. 9 1/12 inches

Answer 1

So, what is the total lenght of the pieces that wer cut off?

we multiply the lenght by the number:

4 $\frac{1}{3}$*5=20+$\frac{5}{3}$=21$\frac{2}{3}$

and we subtract this from the original pipe, that is

30$\frac{3}{4}$-21$\frac{2}{3}$

we need to bring the two fractions to the same denominator (by multiplying the fraction art in the first by 3 and 4 the second):

30$\frac{9}{12}$-21$\frac{8}{12}$=9 $\frac{1}{12}$

so the correct answer is D!