Question

I need to know this for my child as he needs help and I need to explain it

Answer 1

Amira

Explanation:

Let the amount earned by each = $ x.

Josh:

convert 18% to decimal by dividing 18 by 100.

Savings of Josh = 18% of x

= 0.18 * x

= 0.18x

Amira:

If Amira spends 4 out of 5 parts, then Amira saves 1 out of 5.

`\sf Savings \ of \ Amira = (1)/(5) \ of \ x`

`\sf = 0.2x`

Lucas:

Savings : expenditure = 3 : 17

If total part is 20 means, Lucas saving 3 part.

`\sf Savings \ of \ Lucas = (3)/(20) * x\\`

= 0.15x

Now, arrange the savings in descending order,

0.2x > 0.18x > 0.15x

So, Amira saves most of his salary.