MySol

topay= float(raw_input('Enter the outstanding balance on your credit card: '))
int_rate = float(raw_input('Enter the annual credit card interest rate as a decimal: '))
upd_bal = topay
low= upd_bal/12.0
high = (upd_bal*(1+(int_rate/12.0))**12.0)/12.0
epilipson= 0.005
while (high-low) > 0.005:
    monthlypay = (low+high)/2.0
    upd_bal = topay
    for months in range(1,13):
        interest = round(upd_bal*int_rate/12, 2)
        upd_bal += interest - monthlypay
        if upd_bal <= 0:
            break
    if upd_bal > 0:
        low = monthlypay
    else:
        high= monthlypay

print 'RESULT'
print 'Monthly payment to pay off debt in 1 year: ', round(monthlypay,2)
print 'Number of months needed: ', months
print 'Balance: ' , round(upd_bal,2)