Question

Lia has 7 blue pencils and 28 red pencils. Maria has 14 blue pencils and 42 red pencils, and Tia has 10 blue pencils and 30 red pencils. Which girls have the same ratio of blue pencils to red pencils?

Answer 1

Ratios are like fractions, see
For example,
for Lia, she has 7 blue to 28 red.
Means her ratio of blue to red is
7:28

And much like fractions, this ratio can be written in lowest terms, like so:
7:28 = 1:4

Got it?

Answer 2

I have to have the names of the girls