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Mathematics

Grade-7

Easy

Question

The number should be multiply $7 over 2$ to get $21 over 4$ is ___________.

$\frac{21}{14}$
$\frac{2}{14}$
$\frac{1}{14}$
$\frac{1}{4}$

hint Hint:

Simply Divide the product of two number by the given number.

The correct answer is: $21 over 14$

STEP BY STEP SOLUTION
Let the number to be multiplied by $7 over 2 space equals x$
Required number $straight x space cross times space 7 over 2 space equals space 21 over 4$
Required number = $space x equals space 21 over 4 space cross times 2 over 7 space equals space 3 over 2$
The number = $3 over 2$

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