Percentages with Ratio Tables

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.

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Cameron Setter

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