Now we work through these values together on the board: 3/5, then 1/4, then 9/10, and finally 1/6. We will all predict the decimal and percent first, then a named pupil comes up to drag the battery slider and check. Three of them stop cleanly, and one is a new one that runs on. Say which is which before we check each one.

Now we work through these together on the board, one form given each time and the other two to find: 0.6 (which fraction? which percent?), then 1/8, then 70%, then 0.5, and last the tricky one, 1/6 that runs on. Predict where the battery will land before each check.