MathBench > Miscellaneous

Tricks with Division

More uses for Ratios

pound cakeOften ratios are used to compare a part of a mixture to another part of a mixture. For example, classic pound cake is made with

The ratio of any two ingredients in this cake (say, sugar:butter) is 1:1. On the other hand, a “lowfat” pound cake has

Now what is the ratio of sugar to butter?

What is the ratio of carb ingredients (sugar and flour) to fat ingredients (eggs and butter)?

Notice that I added some things up before doing the division. This is natural if I’m interested in categories of ingredients in the mixture.

In case you’re missing the connections to biology here…

We’ll get to some of these lovely examples later in the module.