I had to google - so that's about 18 pounds? The actual number isn't really the focus. It's more important that your LO stays on his or her own growth curve. Percentiles are 1-100 so someone always has to be the "1" and someone has to be the "100." Is there a concern about your baby losing weight or not eating well? Focus more on that than the actual number and ask your doctor if there's a reason to be concerned.
Re: .how to get bigger?