This Instructional Activity is a part of the Lesson 21, Unit 1, Grade 6. Conversion tables are really ratio tables that can be used to convert units of length, weight, or capacity (and other units, too). You must multiply the given number by the ratio that compares the two units. Work with your partner to find out how many feet are in inches. Make a ratio table that compares feet and inches. Use the conversion rate of inches per foot or foot per inch.