Question

Kallah needs to buy ribbon for a sewing project. The fabric store charges 2 dollars per meter. How much will it cost Kallah to buy on ribbon that is 75cm long?

Answer 1

The charge is $2/m.

We need to find how much money it costs for 75cm.
First let's change 75cm to m. There are 100cm to m.

`(75cm)/(1) * (1m)/(100cm) = 0.75m`.

Now we can create a proportion to find how much it costs for a 0.75m ribbon. Then we solve it by cross multiplying.
For some reason I can't put the dollar sign ($) in front of the 2.

`(2)/(m) = (x)/(0.75m) \\\\ x = 2(0.75) = 1.5`

It costs $1.50 to buy a ribbon 0.75m, or 75 cm long.