A micropaleontologist counts 180 foraminifera specimens in a sample. 35% are of species A, 40% are species B, and the rest are species C. How many more individuals of species B are there than species C?

In a growing space of scientific curiosity, foraminifera—microscopic, single-celled organisms with calcium carbonate shells—reveal rich stories about ancient oceans and climate. Recent findings from a study analyzing a 180-specimen sample highlight a striking distribution: 35% belong to species A, 40% to species B, and the remainder to species C. This variety offers insight into ecosystems long hidden beneath geological layers. Understanding which species dominate allows researchers to reconstruct environmental conditions with greater precision. This pattern of species distribution raises a clear mathematical question that combines ecology, data, and real-world relevance.


Understanding the Context

Why tracking microscopic life like foraminifera matters now

Microfossils such as foraminifera are more than tiny curiosities—they are powerful tools in understanding Earth’s history. Scientists count and categorize these specimens to trace changes in ocean chemistry, temperature, and time. A sample with 180 items offers just enough data to highlight trends without oversimplifying complex systems. The distribution—35% species A, 40% species B, and just 25% species C—reflects ecological dynamics relevant to paleoclimatology and marine biology. Recent dialogues around biodiversity resilience and climate impacts have brought attention to such data, as researchers use species proportions to model past ecosystem shifts and predict future changes. This increasing interest fuels curiosity about exactly what these numbers represent.

How a micropaleontologist counts 180 foraminifera specimens in a sample. 35% are species A, 40% species B, and the rest species C. How many more individuals of species B are there than species C?

To uncover the numerical gap, start from the total: 180 specimens. Species A accounts for 35%—roughly 63 individuals. Species B dominates at 40%, equating to 72 specimens. Subtracting species A (63) and species B (72) gives 180 – 63 – 72 = 45 specimens of species C. Thus, species B exceeds species C by 72 – 45 = 27 individuals. This simple breakdown reveals a modest advantage, yet meaningful in scientific analysis. The numbers balance precision and accessibility