Lisa is playing a video game in which she takes care of cats and dogs. She takes care of 4 cats for every 1 dog.
If Lisa takes care of 12 cats in the game, how many animals does she take care of altogether? these are ratios
If for every 4 cats she has 1 dog then you would just do 12 divided by 4 which would give you 3 (that's how many dogs she took care of) you would then just have to add 12 and 3 to get 15.
