Ohio Mathematics Academic Content Standards (2001)
Number, Number Sense and Operations Standard
Use a variety of strategies, including proportional reasoning, to estimate, compute, solve and explain solutions to problems involving integers, fractions, decimals and percents.
Estimate, compute and solve problems involving real numbers, including ratio, proportion and percent, and explain solutions.
Grade Level Indicators (Grade 6)
Use proportional reasoning, ratios and percents to represent problem situations and determine the reasonableness of solutions.
Grade Level Indicators (Grade 7)
Solve problems using the appropriate form of a rational number (fraction, decimal or percent).
Grade Level Indicators (Grade 8)
Estimate, compute and solve problems involving rational numbers, including ratio, proportion and percent, and judge the reasonableness of solutions.
Principles and Standards for School Mathematics
Number and Operations Standard
Understand numbers, ways of representing numbers, relationships among numbers, and number systems
understand and use ratios and proportions to represent quantitative relationships;