0.1 x 10 to the minus 4, and 1000 x 10 to the minus 4

Question

In the above question, I am looking for a range that represents a % of total.

Answer 1

0.1×10⁻⁴=0.00001 or 10⁻⁵.

1000×10⁻⁴=0.1 or 10⁻¹.

0.00001/0.1=0.0001 which is 0.01% if 0.1 is the total.