Question

Last week, eggs cost $ 1.20 per dozen. This week, there was an increase in the cost of 1/6 over last week's cost. What is the cost of eggs this week?

What is the cost of eggs this week?

Answer 1

`$1.20xx1 1/6=$1.20xx1.16667=$1.40`

Explanation:

One way we can do this is to see that $1.20 is 100% of the price last week. Since `100%=1`, we can say that:

`$1.20xx100%=$1.20xx1=$1.20`

This week, there is a price increase of `1/6` over last week's cost. One way we can do this is to multiply the $1.20 with `1 1/6` (this is the 1 from last week plus an additional `1/6` for this week's increase.

`$1.20xx1 1/6=$1.20xx1.16667=$1.40`