I've had to deal with recharacterizations on my taxes before and the IRS instructions, though wordy, are pretty good at explaining how to handle them. The links below are where I got my info from.
Form 1040 instructions - pg 25, under "Lines 15a and 15b - IRA Distributions" (link here:
https://www.irs.gov/pub/irs-pdf/i1040gi.pdf )
Form 8606 instructions - pg 4, under "Reporting Recharacterizations" (link here:
https://www.irs.gov/pub/irs-pdf/i8606.pdf )
Is the full $1500 you recharacterized deductible? If so, I believe this is what you need to do, based on what you told us. You may want to read the IRS instructions to confirm this is correct.
Enter the total distribution ($1,688) on line 15a of your 1040. Then attach a statement to your return explaining the recharacterization. Per the form 8606 instructions, the statement should indicate that you contributed $X,XXX to a Roth IRA on 01/xx/2016, recharacterized $1,500 of those contributions on 12/XX/2016 by transferring $1,688 (the contributions + earnings) to a traditional IRA in a trustee-to-trustee transfer, and that you deducted the traditional IRA contribution of $1,500.
I hope this helps!