Question

Find the difference 9 4/5x- 4/80x

A 7/5X
B 9 4/5X
C 7 4/5X
D 11 4/X

Answer 1

B.

Explanation:

I'm assuming it's written like this when solving it:
`9(4)/(5) x-(4)/(80) x`

first change the mixed number to an improper fraction and change to a common denominator

`(49)/(5)x-(4)/(80)` ----->
`(784)/(80) - (4)/(80)`

`(784)/(80)x - (4)/(80)x = (39)/(4)x\\` ≈
`9(4)/(5)x`