Grace is building a brick wall along her driveway. She estimates that one row of brinks plus mortar will be 2 3/8 inches high. How many rows will she need to construct a wall that is 57 inches high?

would i change the fraction into an improper fraction to multiply the 57?

Yes -- but you need to divide.

57 / (19/8) =

57 * (8/19) = 24 row

Oh, okay.

That makes perfect sense. Thank you very much, Ms. Sue!

You're very welcome, susie.

To find out how many rows Grace will need to construct a 57-inch high wall, we need to divide the total height of the wall by the height of each row.

First, let's convert the height of one row of bricks plus mortar to a fraction.

The given height is "2 3/8 inches." To convert this into an improper fraction, multiply the whole number (2) by the denominator of the fraction (8), and add the numerator (3). The result is 19/8.

Therefore, one row of bricks plus mortar is equivalent to 19/8 inches in height.

To calculate the number of rows, we divide the total height of the wall (57 inches) by the height of each row (19/8 inches):

57 ÷ (19/8)

To divide by a fraction, we can multiply by the reciprocal of that fraction:

57 × (8/19)

Now, we can perform the calculation:

57 × 8 = 456
19

So, Grace will need approximately 456 rows to construct a wall that is 57 inches high.