Explanation below, but in short, a fraction means to divide the top/left number by the bottom/right number. It means to divide 5 by 6.
5/6 = 0.83333333...
Why is this? This is because a fraction simply means to divide the numerator (the top/left number) by the denominator (bottom/right number). So 5 ÷ 6 = 0.83333333... in decimal form.