A fraction is usually split into two parts: the first part is the number on top, called the numerator; and the second part is the number on the bottom, called the denominator. These are both separated by a line called the “divisor line”. We can use the division method help to solve this question: to get a decimal, simply divide the numerator 6821 by the denominator 107 (which you can enter in any calculator):
6821 (numerator) ÷ 107 (denominator) = 63.75
And finally, you get 63.75 as your answer when you convert 63 80/107 (or 6821/107) to a decimal.