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Practice HERE once you see my explanation. Please practice if you want to be good at this!

Short answer: How many digits are repeated? 2, exactly (1 and 5). So 2 digits, you have 99. If you have one digit repeated (like 0.3333...) then its 9.

You are watching: How many repeating digits are in

So, because of its 99. The answer is 15/99. Try to get what I mean.

Long answer:

0.151515151515....

x = 0.151515151515...

100x = 15.1515151515..... (to get this equation you multiply the above by 100)

Based on the red above, use elimination.

99x = 15 (solve for x)

x = 15/99

CalculatorUser Sep 4, 2019

edited byCalculatorUser Sep 4, 2019

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