# 7.1.8 Step 6: How Much Matting is Left?

The original question asked how much the matting is reduced by. Using the sketch above, we can see the shaded area shows the matting after it has been cut to your specifications. You have already used your skills on adding fractions, from Section 6.2, to calculate the dimensions of the matting you need.

You can now use the skills on subtracting fractions, also from Section 6.2, to calculate how much of the matting is left.

## Activity: What Do You Cut Away from the Matting and Discard?

If there are enough scraps left over, then you might find another arts and crafts project to do with them. Let's try to figure out how much of the matting is left over. Don’t worry, there won't be any more crafts today!

How much will be cut off from the bottom of the matting? ### Comment

We know the original and final dimensions of the matting. The width of the original matting was inches and its length was inches; the width of matting we require is inches and the length we require is inches. What operation could we use now to determine how much was trimmed away from the bottom edge of the matting? Think subtraction!

## Activity: What Do You Cut Away from the Bottom of the Matting? The original width of the matting was inches and we need the width to be inches. So we need to cut off a piece from the bottom that is inches wide. Here is the calculation: So, you trim inches from the bottom of the matting.

You could also find the solution using the calculator. The calculator can be accessed on the left-hand side bar under Toolkit. ## Activity: What Do You Cut Away from the Side of the Matting? The original length of the matting was inches and we need the length to be inches. So we need to cut off a piece from the bottom that is inches wide.

Here is the calculation:

Checking with the calculator: So, you trim inches from the right side of the matting.

There is quite a bit left over, so be sure to place the leftovers in your scrapbooking pile!

You have done a lot of math in this section, so now is probably time for a break before we cut out the middle of the matting for the photo.

7.1.7 Step 5: Cutting the Matting

7.2 Cutting the Rectangular Hole for the Photograph