Which is better investment: 11% stock at 143 or (39/4)% stock at 117?

Question: Which is better investment: 11% stock at 143 or (39/4)% stock at 117?

Solution:
Let investment in each case beTk. (143 × 117)
Income in 1st case = {(11/143) × 143 × 117}
= Tk 1287

Income in 2nd case = [{39/(4 × 117)} × 143 × 117]
= Tk 1394.25

Clearly (39/4)% stock at 117 is better.