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 13535 by the denominator 135 (which you can enter in any calculator):
13535 (numerator) ÷ 135 (denominator) = 100.26
And finally, you get 100.26 as your answer when you convert 100 35/135 (or 13535/135) to a decimal.