Respuesta :

Answer:

21/99 or 7/33

Step-by-step explanation:

let 'x' = .21 repeating

100x = 21.21 repeating

subtract 1x from 100x to get:

21.21 - 0.21 = 21

100x - 1x = 99x

99x = 21

x = 21/99 or 7/33 simplified

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