Math

After the seventh month of a 12-month loan:

the numerator is: {(n + 11) + (n + 10) + (n + 9) + (n + 8) + (n + 7) + (n + 6) + (n + 5)} =636264, and
the denominator is: {(n) + (n + 1) + ... + (n + 11)} =798078.

Therefore, the fraction is numerator/denominator (to the nearest tenth) =