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in Mathematics by (33.0k points)

Which of the following has a terminating decimal expansion? 

(a) 32/91 (b) 19/80 (c) 23/45 (d) 25/42

1 Answer

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Best answer

(b) 19/80

19/80 = 19/24 x 5

We know 2 and 5 are not factors of 19, so it is in its simplest form. 

And (24 × 5) = (2m × 5n

Hence, 19/80 is a terminating decimal.

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