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 9840 by the denominator 85 (which you can enter in any calculator):
9840 (numerator) ÷ 85 (denominator) = 115.76
And finally, you get 115.76 as your answer when you convert 115 65/85 (or 9840/85) to a decimal.