This Problem Set is a part of the Lesson 15, Unit 8, Grade 8. Practice Problems 1. Elena and Han are discussing how to write the repeating decimal x = 0.13(7) as a fraction. Han says that 0.13(7) equals 13764/99900. "I calculated 1000x = 137.77(7) because the decimal begins repeating after 3 digits. Then I subtracted to get 999x = 137.64."