Replace $' □'$ in each of the following by the correct number:
$\frac{4}{□} = \frac{12}{15}$

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Solution

The numerator in the second fraction is $12$ .
To get $4$ from $12$ , we have to divide $12$ by $3$
$∴$ To make both fractions equal, we divide the numerator and denominator of the second fraction by $3$ .
so, $\frac{12}{15} = \frac{\frac{12}{3}}{\frac{15}{3}} = \frac{4}{5}$
Hence, the value in the box is $5$ .

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