Question

Can anyone solve this please?
$\frac{3}{4} \times \frac{?}{?} = \frac{?}{?}$
$\frac{2}{5} \times \frac{?}{?} = \frac{?}{?}$
$\frac{1}{2} \times \frac{?}{?} = \frac{?}{?}$

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Answer 1

For this equation to be true I think the question mark should equal 0