Mary earns $28,000 a year plus commission. One week she grossed $655.58. She had sold $1673.19 worth of merchandise. What is the rate of her commission?

Step-by-step explanation:

The parameters given are;

The amount Mary earns annually = $28,000

The amount Mary grossed during a week = $655.58

The amount Mary had sold during the week to make the amount grossed during the week = $1673.19

Given that Mary makes $28,000 per year

Therefore;

The amount Mary earns per week = Amount earned per year/52

The amount Mary earns per week =  $28,000/52 = $538.46

The amount extra she made on commission = $655.58- $538.46= 1$117.12

The commission rate = Commission earned/(Amount of merchandise sold)×100

The commission rate = 117.12/1673.19 × 100 = 6.99%

Her commission rate = 6.99%

irrational, cannot