Male support engineer, brown hair, blue shirt, red tie: I'm calling regarding the problem you were having this morning with your email. Male, brown hair, white shirt: Our ratio of computers to support ...

A GCSE Maths video about what frequency trees are and how to create them. With worked examples, this video shows how frequency trees can be used to record and organise large amounts of information ...

Sure! Here's the YouTube video description with all the links and additional text removed: --- Learn how to solve proportions. Two ratios are said to be proportional when the two ratios are equal.