Question

What is the difference?
9/4-1/7

Answer 1

you need a common denominator for both fractions before you can subtract.

Answer 2

can you find the common denominator ?

Answer 3

I don't know what can be the denominator

Answer 4

there are a few ways. the simplest is to multiply the two bottoms 4*7=28

that always gives a common denominator, but sometimes it gives you a bigger number than it has to be.

Answer 5

9/4-1/7 = 63 - 4 / 28 = 59 / 28

Answer 6

pick the smallest one from both columns that is the same