If we have to divide a quantity into a given ratio (e.g. share $100 in the ratio 1:2:3:4 between Ann, Ben, Cat and Don), then we first need to find out what one “part” represents and then use that to calculate each of the other parts.

So in the above example there are 10 parts altogether (can you see why?). So how much is each part worth? And how much do each of the people get?

**Examples**

**Exercise**

Let’s complete exercise 16D on pages 255 and 256 of the textbook:

The answers are below: