Divide 10.5% by 100% to get 0.105.
10.5% is equivalent to 0.105.
Multiply that with 30
0.105 * 30
= 3.15
These are all possible (and equal) forms of the answer:
Decimal: 3.15
Improper fraction: 63/20
Mixed number: 3 3/20
I hope this helps.
Have an awesome day! :)