The pie chart below shows the heights (in \(cm\)) of 30 pupils in a class. The biggest slice of the pie chart contains the most people: \( 151 - 160cm\). The angle of this sector is \(36^{\circ}\).

In order to make your writing clear, you need to use commas. As well as using them to separate out key information, or divide up different clauses, commas can also completely change the meaning of a ...