Question

Write an equivalent FRACTION to 5/8 that has a denominator of 40

then reduce 25/40 = 5/8 or would the answer still be 25/40

Answer 1

To do this is simply if you remember how to convert from one denominator to the other. I start by writing the two numbers side by side like so.
5/8 = ?/40
Then 8 goes into 40 how many times? That would be 5. Then 5 x the numerator = 25, so the answer is 25/40. You can always check it to see if it reduces to 5/8 and it will because both numerator and denominator can be divided by 5 to give 5/8.

Answer 2

Your set up is correct.

I will replace ? with x and solve for x.

5/8 = x/40

We now cross-multiply.

8 times x = 8x.

5 times 40 = 200

We now have:

8x = 200

To find x, we divide both sides of the equation by 8.

x = 200/8

x = 25

What is the same fraction as 5/8?

The answer is 25/40.

Done!