Question

what should be added to twice the rational numbers -8/5to get 5/8?

Answer 1

Solution

Let the number added is x.

=> (-8 / 5) × 2 + x = 5 / 8

=> (-16 / 5) + x = 5 / 8

★ Now, add (16 / 5) on both the side to get the answer.

=> (-16 / 5) + x + (16 / 5) = 5 / 8 + (16 / 5)

★ Here, both (-16 / 5) and (16 / 5) are cancelled out. Now, x is left here in this Solution.

=> x = 5 / 8 + 16 / 5

=> x = (25 + 128) / 40

=> x = 153 / 40

.°. x = 153 / 40 should be added to twice the rational number (- 8 / 5) to get 5 / 8.

Note: If you want to know in decimal, then it is 3.825.

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