Having this info, solve problem at bottom. Perpetual bond that pays an annual coupon of $200 per year and yields on competing instruments are 5%. If competing yields are expected to change to 12%, what is current yield on same bond assuming you paid $4000?

This is the part I'm having a problem with. If you sell this bond in exactly one year, having paid $4,000 and received exactly one coupon payment, what is your total return if competing yields are 12%? (answer in %)