Peculiar Percentiles

Baby boom - growth of populationDane had his four month check-up on April 20th. He did well he was almost 14 pounds and 24 inches. He is supposedly in the 25th percentile for height and weight. So I asked the Dr. if that was very below average if 100% was where he should be. The Dr. explained to me that 50% is average. So, Dane is a little smaller than boys his age.
Today Ryan had his check up (on May 18th).  He was in the 90th percentile for height and weight. The nurse said he’s going to be a big boy.
What’s with the percentages? Doesn’t this seem off? I thought it was out of 100? It’s a common discussion in the our house.

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