As per the report of the Technical Group on Population Estimates constituted…

Concept: Government demographic projections classify India’s population into age bands — child (0-14), youth (15-29), working-age (15-59), and elderly (60+) — to track shifts such as the "demographic dividend". A band’s share of the population is derived by dividing that band’s projected population by the total projected population for the same year.

Application:

1. The Technical Group on Population Projections (constituted by the Ministry of Health and Family Welfare), whose figures are cited in the Ministry of Statistics and Programme Implementation’s "Youth in India 2022" report, projected India’s total population in 2021 at approximately 1,363.0 million (precisely 1,363.006 million per the underlying data).

2. The same report projected the population in the 15-29 years age group in 2021 at approximately 371.4 million (precisely 371.426 million).

3. Dividing the youth population by the total population gives 371.426 / 1,363.006 ≈ 27.25%, which the report publishes, rounded to one decimal place, as 27.3%.

Cross-check: This 27.3% figure is consistent with the widely cited estimate that youth (15-29 years) made up a little over one-fourth of India’s population around 2021, a figure that underpins discussions of India’s demographic dividend; the other offered percentages do not correspond to the report’s published age-band share for that year.