100 fluid ounces of laundry detergent sells for $12.99. what is the cost per fluid ounce rounded to cents?

The cost per fluid ounce is ≈$0.13

Step-by-step explanation:

We can use proportion to solve this;

Let x be the unit cost per fluid

100 fluid ounce= $12.99

 1     fluid once  =  x

Cross multiply

100x = $12.99

Divide both-side of the equation by 100

100x/100 = $12.99/100

(On the left-hand side of the equation, 100 at the numerator will cancel-out 100 at the denominator leaving us with just x while on the right-hand side of the equation $12.99 will be divided by 100)

x = $0.1299

x≈$0.13

Therefore the cost per fluid ounce is ≈$0.13

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