Bobby wants to invest $100. His brother invested $2,000 for one year and earned $60 in simple interest.
If Bobby invests his money for one year at the same interest will he earn?
The interest earned by Bobby's brother is 60/2000 = <<60/2000=0.03>>0.03, or 3%.
Bobby can expect to earn 3% on his investment as well, so he will earn 100 * 0.03 = $<<100*0.03=3>>3 in interest. Answer: \boxed{3}.