I’m stuck in my exercise about how long it will take to pay off a loan. I’m trying to do a loop calculating the interest and new balance after each monthly payment. Here what’s I have so far:

```
def conta ():
total = float(input('How much do you want to borrow?'))
qtoPg = float(input('What is the monthly payment amount?'))
annualInterest = float(input('What is the annual interest rate expressed as a percent?'))
rateMonth = (annualInterest*0.01)/12
tjm = total*rateMonth
nbalance = total+tjm-qtoPg
while nbalance <= qtoPg:
tjm = nbalance*rateMonth
print (nbalance)
```

Source: Python Questions