Reads journals, manuals and professional publications; speaks informally to groups of co-workers, staff in other organizational agencies, general public, people in other organizations and presents training; composes original reports, training and other written materials, using proper language, punctuation, grammar and style. Uses mathematics involving the practical application of fractions, percentages, ratios and proportions; or measurements, logarithmic, or geometric construction; may use algebraic solutions of equations and inequalities; descriptive statistics; deductive geometry, plane and solid, and rectangular coordinates; mathematical and classifications or schemes.