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 10159 by the denominator 101 (which you can enter in any calculator):
10159 (numerator) ÷ 101 (denominator) = 100.58
And finally, you get 100.58 as your answer when you convert 100 59/101 (or 10159/101) to a decimal.