What if I said you could teach your students one thing and they could answer everything to do with Percentages?
Don't believe me?
Let me show you:
Finding a percentage of an amount
Q: Find 20% of 925
Increasing/Decreasing by a percentage
Q: Decrease 45 by 16%
Expressing as a percentage
Q: A cereal bar weighs 24g. The cereal bar contains 3.6g of protein. Work out what percentage of the cereal bar is protein
Percentage Change
Q: Rebecca bought a dress for £80. She later sold it for £116. Find the percentage profit.
Reverse Percentages
Q: A car increases in value by 35% to £2500. What was its original price?
Ratio tables can be used for it all. There is obviously going to need to be some further teaching about what an increase/decrease is, how to work out the multiplier etc, but it is a great tool we should all be using more often
You may have worked out by now that I like using Ratio tables.