This Problem Set is a part of the Lesson 13, Unit 1, Grade 7. Students use tables to find an equivalent ratio of two partial quantities given a part-to-part ratio and the total of those quantities, in the third column, including problems with ratios of fractions. The teacher may allow students to utilize a calculator to assist in the multiplication step of converting mixed numbers to improper fractions. Value of the ratio of backpack weight to hiker weight.