What is one fourths plus three fourths?

Hello Monikap718,

1/4+3/4=1

One fourth = 1/4

Three fourths = 3/4

You don't add the denominator (bottom number - or the number on the right in this case), but you do add the numerator (the top number - or the number to the left), which gives you 4/4 (Because 3 + 1 = 4). That's the same as writing 1.