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 4178 by the denominator 57 (which you can enter in any calculator):
4178 (numerator) ÷ 57 (denominator) = 73.3
And finally, you get 73.3 as your answer when you convert 73 17/57 (or 4178/57) to a decimal.