International Board of Certified Lactation Consultant (IBCLC) Practice Exam

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If a child is at the 75th percentile for weight, what percentage of children his age weigh less than him?

  1. 50%

  2. 75%

  3. 25%

  4. 10%

The correct answer is: 75%

When a child's weight is at the 75th percentile, it indicates that they weigh more than 75% of children their age. In percentile rankings, the 75th percentile means that the child is heavier than a significant majority of their peers—specifically, 75 out of 100 children (or 75%). This means that the remaining 25% of children, or one-quarter of the group, weigh more than the child in question. Therefore, the implication of being in the 75th percentile is that 75% of their peers weigh less. This percentile ranking provides a relative measure of the growth and development that compares the child to a broader reference population, indicating that the weight falls within the norm for that age group.

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