How do you write 56 as a percent?

"Percent" or "%" means "out of 100" or "per 100", Therefore x% can be written as 
${\displaystyle \frac{x}{100}}$ 
As a result, we can write an equation as and find the value of x: 
${\displaystyle \frac{x}{100}=\frac{5}{6}}$ 
${\displaystyle 100\times \frac{1}{100}=100\times \frac{5}{6}}$ 
${\displaystyle 100\times \frac{x}{100}=\frac{500}{6}}$ 
${\displaystyle x=83.3}$ 
${\displaystyle \frac{56}{=}83.3\mathrm{\%}}$

Let's quickly review some fundamentals of fractions before moving on to the conversion from fraction to percentage. Always keep in mind that the denominator is the number that comes after the fraction line and the numerator is the number that comes before it. This will be put to use later in the tutorial.
When we are using percentages, what we are really saying is that the percentage is a fraction of 100. "Percent" means per hundred, and so 50% is the same as saying 50/100 or 5/10 in fraction form.
So, since our denominator in 5/6 is 6, we could adjust the fraction to make the denominator 100. To do that, we divide 100 by the denominator:
$100÷6=16.666666666667$
Once we have that, we can multiple both the numerator and denominator by this multiple:
$\frac{5\times 16.6666666667}{6\times 16.6666666667}=\frac{83.3333333333}{100}$
Now we can see that our fraction is 83.333%