Hey there!
Here is your answer:
The proper answer to this question is "0.33".
Reason:
10% = 10/100
0.1 of 3.30
0.1*3.30
= 0.33
10% of £3.30 is £0.33
Therefore the answer is 0.33!
If you need anymore help feel free to ask me!
Hope this helps!
~Nonportrit