. 2.2.3.2 Use a tone and word choice appropriate for the industry and organization (e.g., writing is professional and courteous). 2.2.3.3 Show insight, perception, and depth in writing.2.3 Mathematics: Using mathematics to express ideas and solve problems.2.3.1 Computation 2.3.1.1 Add, subtract, multiply, and divide with whole numbers, fractions, decimals, and percents. 2.3.1.2 Calculate averages, ratios, proportions, and rates. 2.3.1.3 Convert decimals to fractions and fractions to decimals. 2.3.1.4 Convert fractions to percents and percents to fractions. 2.3.1.5 Convert decimals to percents and percents to decimals. 2.3.1.6 Understand relationships between