Ratios, Percents, Algebra, Integers

1. Explain in your own words what a ratio is and why the order of the quantities matters when writing a ratio.

2. In a classroom, there are 12 boys and 16 girls. Write the ratio of boys to girls in three different ways (using "to", a colon, and a fraction).

3. You have a collection of colored pencils: 5 are red, 3 are blue, and 2 are green. What is the ratio of blue pencils to the total number of pencils? Simplify the ratio if possible.