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 9870 by the denominator 90 (which you can enter in any calculator):
9870 (numerator) ÷ 90 (denominator) = 109.67
And finally, you get 109.67 as your answer when you convert 108 150/90 (or 9870/90) to a decimal.