A historian discovers that 12% of 1,500 scientific letters from the 18th century mention newly proposed theories. Of those, 5/6 were written by women. How many letters mentioning new theories were authored by women?

["Title: A Groundbreaking Discovery: How 12% of 18th-Century Scientific Letters Reveal Women’s Pioneering Role", "In a remarkable historical breakthrough, a dedicated historian has uncovered striking insights from a trove of 1,500 scientific letters exchanged across 18th-century Europe. The analysis reveals that 12% of these correspondence documents mention newly proposed scientific theories—a figure that not only underscores the rapid pace of scientific innovation during the Enlightenment but also highlights a previously underrecognized contribution: women played a significant role in advancing these ideas.", "### The Numbers Behind the Discovery", "Let’s break down the key statistics:", "- Total scientific letters examined: 1,500\n- Percentage referencing new theories: 12%\n- Fraction authored by women: 5/6 of those letters", "Calculating the numbers step by step:\n12% of 1,500 equals 180 letters explicitly mentioning new scientific theories. Of these 180 letters:\n5/6 were written by women, meaning:\n[\n\frac{5}{6} \ imes 180 = 150\n]", "This means 150 letters referencing emerging scientific theories were authored by women—a powerful testament to their active participation in shaping scientific discourse despite prevailing societal barriers.", "### Beyond the Numbers: Women’s Silent Contributions", "For centuries, women’s voices in science have been marginalized or overlooked. This discovery adds compelling evidence to the narrative that 18th-century women were not passive observers but informed contributors to groundbreaking scientific debates. The fact that over one-fifth of the letters proposing new theories were written by women challenges longstanding assumptions and calls attention to their overlooked intellectual agency.", "Many of these letters reveal how women engaged with cutting-edge ideas—tracing astronomical observations, debating chemical experiments, and speculating on mechanical principles—often in private or semi-public scholarly networks. Their participation signals an untapped wellspring of Enlightenment thought deserving greater recognition.", "### Why This Discovery Matters", "This statistical reveal isn’t merely academic—it’s a vital correction to historical inertia. By quantifying women’s authorship in these scientific letters, the historian helps reclaim their place in the story of scientific progress. It shows that the Enlightenment’s scientific revolution was more inclusive than commonly portrayed, fueled in part by women thinkers who understood, discussed, and even helped to pioneer new theories.", "Understanding these contributions enriches our view of history and inspires future generations of diverse researchers to continue pushing the boundaries of knowledge.", "### Final Thoughts", "The discovery that 150 letters* from 1,500 18th-century scientific correspondence mention new theories—championed by women in 5/6 cases—is more than a fascinating statistic. It is a compelling reminder of women’s enduring intellectual energy and a call to preserve, analyze, and celebrate more of their historical contributions to science.", "If you want to explore how modern historians are uncovering women’s roles in science, visit [link to related academic resource or museum archive].", "Header keywords: 18th-century scientific letters, women in science history, Enlightenment correspondence, discovery women scientists, 12% of 1500 letters, historical gender roles in science, female scientific authors, scientific theory innovation 1700s."]