This Problem Set is a part of the Lesson 13, Unit 2, Grade 7. Students understand that the context of a real-life situation often determines whether a rational number should be represented as a fraction or decimal. Students understand that decimals specify points on the number line by repeatedly subdividing intervals into tenths (deci- means tenth). Students convert positive decimals to fractions and fractions to decimals when the denominator is a product of only factors of either 2 or 5.