In order to know the percentage we need to divide 386 by 456
[tex] \frac{386}{456} = \frac{193}{228} = \frac{193*100/228}{228*100/228} = \frac{84.649}{100} [/tex].
Therefore it is 84.649% or 84.65% (it depends how your teacher recommends you to round it.
We only get the numerator since per cent means per 100. You only do this when your denominator is already 100. Another way of getting the percentage is straight out dividing the numbers then multiply the result by 100.