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The standard form of rational number $− 27 45$ is:

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− 2 5

− 3 5

− 6 5

− 7 5

answer is B.

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Detailed Solution

Given a rational number

− 27 45

.
If H.C.F. of numerator and denominator is only 1 such that the denominator is always positive, then the rational number is said to be in standard form.
Prime factors of 27 and 45,

27 = 3 × 3 × 3

45 = 3 × 3 × 5

H.C.F = 9
Now, dividing and multiplying by 9

= − 27 45 × 99 = − 3 5

Standard form is

− 3 5

.
Therefore, option 2 is correct.

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