6.1.1 In the News

Activity symbol Activity: In the News

Fortunately, some information on who was interviewed was provided in the press release: 500 Welsh people were surveyed.

By dividing this group into quarters, work out how many of the people agreed with the view in the headline. How many did not agree?

Hint symbol

Discussion

Did you break 500 into four equal parts? Out of those four parts, how many parts agree that wind farms are necessary? What do you need to do with these pieces of information, then, to determine how many survey participants did and did not say that wind farms were necessary?

Solution symbol

Answer

Three-quarters of the 500 people agreed.

First, split the group into quarters by dividing 500 by 4: 500 division four equals 125 people—one-quarter of the people surveyed.

Three-quarters of the group means we need three sets of 125 people.

Since three multiplication 125 equals 375, 375 people agreed with the statement and 125 did not. (You can check your arithmetic by noting that 375 plus 125 equals 500.)

In a similar way, you can often make sense of most everyday fractions by:

  1. Dividing the amount or number into the desired number of equal parts.
  2. Considering how many of these parts you need.

There will be occasions when you will need to carry out more involved calculations involving fractions. The next part of this section introduces fractions, and then considers some calculations that you can work out using your calculator.

6.1.2 Folding Paper