Question

12 out of 30 people chose their favourite colour as blue caculate the angle you would use for blue on a pie chart

Answer 1

The angle = 144 degrees.

Explanation:

Look at it this way (it is a proportion question)

30 people would require a pie chart made of a full circle (360 degrees)

12 people would require x part of the pie chart.

30/360 = 12 / x Cross multiply

30x = 360 * 12 Simplify the right

30x = 4320 Divide by 30

30x/30 = 4320/20

x = 144 Answer