Although of all newborns in the united states fall into the low-birthweight category, they account for of newborn deaths.

The newborns below the weight of 2.5 kg or 5.5 lbs, are considered as the under weight.

It is estimated that out of total children in United States almost 7% of the individuals fall under the category of underweight newborns.

All the newborns, which fall in underweight category have a less chance chance for survival, and they account majority of neonatal deaths.

So, the first blank can be filled with 7% and the second blank can be filled with majority.

yes, because even though a theory has a  lot of evidence to support it, it is not always true