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 68 by the denominator 42 (which you can enter in any calculator):
68 (numerator) ÷ 42 (denominator) = 1.62
And finally, you get 1.62 as your answer when you convert 1 26/42 (or 68/42) to a decimal.