Which ratio correctly compares 120 cm to 80 mm. a. 3 to 20 b. 3 to 2 c. 15 to 1 d. 150 to 1 explain will rate 5 stars

Firstly it is important to make both the units same for creating a ratio. Here one of the number mentioned is in centimeter while the other number that is mentioned is in millimeter.
We already know
1 cm = 10 mm
Then
120 cm = 10 * 120 mm
             = 1200 mm
Now we can go for creating the required ratio.
So the ratio that compares 1200 mm to 80 mm is = 1200:80
                                                                                 = 120:8
                                                                                 = 15:1
So the correct ratio is 15 to 1. The correct option among all the options given in the question is option "C".