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 5894 by the denominator 40 (which you can enter in any calculator):
5894 (numerator) ÷ 40 (denominator) = 147.35
And finally, you get 147.35 as your answer when you convert 144 134/40 (or 5894/40) to a decimal.