Question

what number must be subtracted from each term of the ratio 19 :21 to make it 7 : 8​

Answer 1

Answer:

let the number be x

$x - \frac{19}{21} = \frac{7}{8} \\ x = \frac{7}{8} + \frac{19}{21} \\ x = \frac{7 \times 21 + 19 \times 8}{8 \times 21} \\ \\ x = \frac{299}{168} \\ x =$