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Question
To get the product 1, we should multiply `8/21` by ______.
Options
`8/21`
`(-8)/21`
`21/8`
`(-21)/8`
Solution
To get the product 1, we should multiply `8/21` by `underlinebb(21/8)`.
Explanation:
Let the number be x.
`x xx 8/21 = 1`
Divide each side with `8/21`,
`x = 1/(8/21) = 21/8`
Thus, we should multiply `8/21` by `21/8` to get 1.
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