Sorry, just saw the post now.

0.45 was the amount I lent
0.3868164 was repaid in total, so far

0.0631836 left to pay the principal.

As for the interest, it added up to .06 for the first 4 months before a partial repayment. I then said that the remaining balance could be kept at the same rate, 3%, which would've been 0.00689860 BTC a month until the last repayment.

In total this would exceed .12 BTC, but I'll settle on .1 BTC interest since I don't really feel like going back and doing all the calculations. I just want this loan to be done with.

So 0.1631836 BTC total.