He simple interest on an investment of $2000 for one year is $110.
what is the interest rate?
a.
0.0055%
b.
0.055%
c.
0.55%
d.
5.5%

You're looking to find how much of 2000 $110 is. What percent of 2000 is 110?

110 parts out of 2000 parts can also be written in a fraction:

= 
= 0.055

To get a percent from a decimal, you multiply by 100:
0.055 * 100 = 5.5%

So, $110 is 5.5% of the initial $2000. Hope this helps! :)