Unit K Concept 10: Writing repeating decimal as a rational

In this concept, student will learn about rational number. Students will be able to write the repeating decimal as a rational number without using a calculator. To solve for it, you need to use the sum of infinite geometric series. Students need to find the firs term and the common ratio. To get the common ratio. To find the common ratio, you take the number divided by the preceding number. Finally you plug into the formula and evaluate.

One thing that students need to be careful about it listing out the number. It will give you a completely different number if it is not listed right. Also students should be careful about subtracting the whole number by the fraction.