write 2 fractions in which the least common denominator is 20

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Multiply 20 by two different prime numbers. So we could use 2 and 3 as the prime numbers making the denominators 40 and 60. Or we could use 1 and 2 as the numbers.

The following three fractions have LCD=20:

1/20, 1/40, 1/60. Any two of these.

Also: 3/20, 7/60; etc.

by Top Rated User (1.2m points)

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