I planted 1 lettuce seed in each of these circular ‘cells’ 4 days ago.

Do you think they are growing well? Explain how you know.

Can you work out the **fraction** that have germinated?

Not all seeds will grow successfully. Sometimes seed packets show a **germination ** **percentage rate** (%). In other words, this tells you **on average** how many seeds out of 100 you would expect to germinate**.**

A gardener sowed 100 of the Calendula ‘Fiesta Gitana’ seeds shown above. She observed that 90 of the seeds germinated successfully. Compare her results with the **germination percentage **shown on the seed packet.

Can you explain why they are different?

You can convert your germination fraction into a ‘germination

percentage rate’, like we saw on these seed packets like this:

- Identify the
**numerator**(top) and**denominator**(bottom) of your fraction. - Use a calculator to divide the numerator by the denominator.
- This gives you the decimal equivalent to the fraction.
- Multiply this by 100 to calculate the percentage. That’s it!

Write your result into your worksheet now.

**Challenge**! If you want to practise your numeracy skills, try to convert from the fraction to the percentage without using a calculator (or a safety rope!).

**HINT**: First try to find an equivalent fraction with a denominator that is a factor of 100.

## Definitions

- Numerator: the top number in a fraction
- Denominator: bottom number in a fraction
- average: a number that describes the middle value of a set of data
- percentage: a fraction expressed with a denominator of 100 written with this symbol %, which is actually the units in 100 rearranged!