Learn how to calculate with fractions in this guide from BBC Bitesize Key Stage 3 Maths.

There are two basic ways to do fractions on your iPhone calculator. Here's what you need to know to use the built-in app.

Calculate the arc length to 2 decimal places. First calculate what fraction of a full turn the angle is. 90° is one quarter of the whole circle (360°). The arc length is 1 4 of the full ...