**E, 144**

So, we can think of this question as*“how many small rectangles can fit into the larger one”*. Thus, we are dealing with “area” and we need to convert one or the other into the same units of measure.

I will convert the big sheet into inches. We know that:

**• 1 foot = 12 inches**

**3 ft (12 in)/(1 ft) = 36 inches**

**5 ft (12 in)/(1 ft) = 60 inches**

1.) Therfore, 3 ft = 36 inches and 5 ft = 60 inches

2.) Now, let’s find the area of the big rectangle (sheet).

**36 in 60 in = 2160 in^2**

**The area of the big rectangle is 2160 inches squared.**

3.) We want to know how many small rectangles can fit into the big one, so now, we need tofind the area of the smaller rectangle too

**3 in 5 in = 15 in^2**

**The area of the smaller rectangle is 15 inches squared.**

4.) Now, we divide the big rectangle area by the small rectangle area. This will tell us how many small rectangles can fit into the big one.

**2160 in^2 / 15 in^2 = 144**

Our units cancel out perfectly. We can make 144 small cards.

Thank you for reading and I hope that this helps.

Sincerely,

The Real McKoy