Fractions

For the last couple of weeks room 12 have been learning about fraction of a set.
We each were given an equation and we were to write the answer and also see the way we got the answer. My equation was Rachel had 20 flowers and she wanted to plant one quarter of them in each row. I had to work out how many rows she would plant and this is how I worked it out.
I knew that 20 divided by 4 was 5 therefore one quarter of 20 would be 5.
I though that this was really easy because I knew my multiplication ....