Answer:
Her balance would be $ 90,931.84.
Step-by-step explanation:
The future value of a loan is,
![F.V.=P.V.(1+i)^n-\frac{Pmt}{i}[((1+i)^n-1]](https://tex.z-dn.net/?f=F.V.%3DP.V.%281%2Bi%29%5En-%5Cfrac%7BPmt%7D%7Bi%7D%5B%28%281%2Bi%29%5En-1%5D)
Where, P.V. is the present value of the loan,
i is the rate per period,
Pmt is Payment per period,
n is the number of periods,
Here, P.V. = $ 115000,
Also the payment is paid per month,
And, annual rate of interest = 7.2 % = 0.072,
So, the rate per period ( per month ) = 
( 1 year = 12 months )
Pmt = $827.53
Number of years = 25 - 15 = 10 years ( 25-year loan and we have to find her balance when 15 years left )
So, the number of periods, n = 12 × 10 = 120 months
Hence, by the above formula her balance when 15 years left is,
![F.V.=115000(1+0.006)^{120}-\frac{827.53}{0.006}[(1+0.006)^{120}-1]](https://tex.z-dn.net/?f=F.V.%3D115000%281%2B0.006%29%5E%7B120%7D-%5Cfrac%7B827.53%7D%7B0.006%7D%5B%281%2B0.006%29%5E%7B120%7D-1%5D)
