My colleague Adrian has submitted a guest post in the form of a video explaining how to answer a typical QTS mental arithmetic question on percentages. Adrian? Take it away. Or rather, divide it and multiply it!
Colin is a Weymouth maths tutor, author of several Maths For Dummies books and A-level maths guides. He started Flying Colours Maths in 2008.
He lives with an espresso pot and nothing to prove.