Picture a shop window with a sign: 25% OFF €60. Roughly how much money would that take off the price? Before we work it out the careful way, what does your gut say, and is there a shortcut hiding in that 25%?

Each bar shows a percentage of an amount built up from equal parts. Look at how each bar is already split into equal parts and work out the amount shown. Notice which parts we use and how we combine them.

Find a percentage by starting from 10%. First find 10% of €35, then build up to 20%. Predict each answer before you check it.

Now work each of these in your copy, then we check them together on the board. Each one is a step harder than the last: 20% of €45, then 75% of €60, then 15% of €80, and finally a two-part saving problem, a €240 bike with 35% off. Work out the saving, then say what you would actually pay.