to prepare for a presentation Pete colored one half of a poster Rebecca colored third of the poster what fraction still needs to be colored

1/2 + 1/3 = 3/6 + 2/6 = 5/6

6/6 - 5/6 = 1/6

1/3

To find out what fraction of the poster still needs to be colored, we need to subtract the fractions that have already been colored from the whole.

Let's start by representing the fractions that have already been colored:

- Pete colored one half of the poster, which can be represented as 1/2.
- Rebecca colored one third of the poster, which can be represented as 1/3.

To find a common denominator, we need to consider the least common multiple (LCM) of 2 and 3, which is 6. Now, let's convert the fractions to have a common denominator of 6:

- Pete colored 1/2 of the poster. Multiplying the numerator and denominator by 3, we get 3/6.
- Rebecca colored 1/3 of the poster. Multiplying the numerator and denominator by 2, we get 2/6.

Now, let's subtract the colored fractions from the whole:

1 - (3/6 + 2/6) = (6/6) - (5/6) = 1/6

Therefore, one-sixth (1/6) of the poster still needs to be colored.