Five out of every nine pencils are yellow. You can make a fraction for this:

You have 45 pencils. To find the amount of yellow pencils, multiply the fraction by 45. First set up the equation:

Make 45 as a fraction so that you'll be multiplying fractions together. It will also make it easier.
To write a whole number as a fraction, ALWAYS make the whole number the denominator and 1 as the numerator.

Here is the "new equation":

Multiply. You multiply the numerators and denominators together.

That means 25 pencils are yellow