what is 3/4-3/8 ? I really don't under stand
Think about having a pizza divided in to 4 pieces.
Then think about a pizza divided into 8 pieces.
We are saying if I have 3/4 of a pizza, someone is going to remove 3/8 of it.
It doesn't make sense unless we are talking about the same sizes.. so we would change 3/4 to 6/8
That means I have 6/8 of the pizza and someone takes 3/8 of it.
That leaves me with 3/8
When you subtract fractions, they have to have the same denominators. You keep the denominators and subtract the numerators.
Thanks
To subtract fractions, you need to have a common denominator. The denominator is the bottom number of a fraction. In this case, the denominators are 4 and 8.
To find a common denominator, you can determine the least common multiple (LCM) of the two denominators, which is the smallest multiple that both numbers divide evenly into.
The LCM of 4 and 8 is 8, so we need to rewrite the fractions with a common denominator of 8.
Now let's proceed with the subtraction:
3/4 - 3/8
To rewrite the fractions with a common denominator of 8, we need to multiply the numerator and denominator of the first fraction (3/4) by 2, and the numerator and denominator of the second fraction (3/8) by 1:
(3/4) * (2/2) - (3/8) * (1/1)
Multiplying the numerators and denominators:
(6/8) - (3/8)
Now, since the fractions have a common denominator of 8, you can subtract the numerators directly:
6/8 - 3/8 = (6 - 3)/8 = 3/8
So, the answer to 3/4 - 3/8 is 3/8.