The length of the Titanic was 882 feet. Porter's history class is building a model of the Titanic. The model is 1/100 of the actual length of the ship. How long is the model?

8.82 feet

Let's set up the ratio. We know that the actual length of the ship was 882 feet and we want to know how long the model will be. We also have a ratio of 1 model length to every 100 actual length. So we can write this as:

##"Model length"/"Ship length"="1 Model length"/"100 actual length"##

And we can drop in some numbers (I'll also put in the variable ##x## to represent the length of the ship model):

##x/882=1/100##

Let's cross multiply to solve for x:

##100x=882##

##x=8.82## feet