Question

How much will 27 copies cost if it cost $4.50 to make 150 copies?

use cross multiplication

Answer 1

Hey there!

To start, first set up a proportion where x is the cost to make 27 copies:
27/x=150/4.50

Now, solve for x by cross multiplying which should look like this:
27*4.50=x*150

Now simplify and solve for x:
121.5=150x
x=0.81

Therefore, it costs $0.81 to make 27 copies.

Hope this helps!