<p>What fraction of the whole piece of paper is the largest triangle?<br>
  What fraction of the whole piece of paper is the second triangle which is labelled 
  number 2?<br>
  Try adding the area of the next triangle in the series each time and noting 
  the answer.</p>
<p>As you keep adding areas on, what fraction are your answers getting closer 
  to? <br>
  Try working out equivalent fractions so that they all have the same denominator, 
  then you can compare sizes easily - you may like to use a calculator to help 
  with the larger numbers!</p>