Let me explain this to you....
7 1/7...to turn this into an improper fraction, take ur whole number (7) and multiply it by ur denominator (7 x 7 = 49), then add ur numerator (1)....49 + 1 = 50....now put that over ur original denominator (7)....resulting in :
50/7. <== ur answer
In summary : (whole number x denominator + numerator) / original denominator.
