Question

what should be added to 7 upon 12 to get minus 4 upon 15​

Answer 1

let x be added

7/12 + x = -4/15

x = -4/15 - 7/12

x = (-16 ) - 35/60

x = -51/60

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Answer 2

Let the number be x

According to the question

$\frac{7}{12}+x = \frac{ - 4}{15}\\ x = \frac{ - 4}{15} - \frac{7}{12} \\ x = \frac{ - 16 - 35}{60} \\ x = \frac{ - 51}{60} \\ x = \frac{ - 17}{20}$