Question

Vinh has two wooden board. One board is 11 3/8 feet long and the other is 5 1/2 feet long. What is the difference in length of the boards?

Answer 1

Convert the mixed numbers to improper fractions, then find the LCD and combine.

Exact Form:
47/8

Decimal Form:
5.875

Mixed Number Form
5 7/8

Answer 2

Answer:

Vinh has two wooden board. Difference of length of two boards is $\frac{47}{8}$ feet that is $40\frac{7}{8}$ feet.

Solution:

Given that  

Vinh has two wooden boards

Length of one board = $11\frac{3}{8}$ = $\frac{91}{8}$

Length of second board = $5\frac{1}{2}$ = $\frac{11}{2}$

Difference of length of two boards = length of first board - length of second board

Difference of length of two boards = $\frac{91}{8} - \frac{11}{2}$

On cross-multiplication we get,

$= \frac{182 - 88}{16}$

$= \frac{94}{16}$ $= \frac{47}{8}$

hence difference of length two boards is $\frac{47}{8}$ feet that is $40\frac{7}{8}$ feet.