Question

Please I need help

Answer 1

Answer:

Hi! You just have to take his salary as a unity (one) and substract the fractions you are given. For example; lets say you have a cake (one) and then you eat 1/8 of it. You would be left with  $1-\frac{1}8}$ of the original cake.

Step-by-step explanation:

Salary:     $1$

Spent $\frac{2}{5}$ :     $1-\frac{2}{5}$

Spent $\frac{1}{4}$:      $1-\frac{2}{5} -\frac{1}{4}$

Spent $\frac{1}{8}$:      $1-\frac{2}{5} -\frac{1}{4} -\frac{1}{8}$

REMAINING: $1-\frac{2}{5} -\frac{1}{4} -\frac{1}{8}$

Operate using LCM:  $\frac{40-16-10-5}{40} = \frac{9}{40}$

The answer is (d)