Question

by which number 2/3rd of 7/8 be divided to get 2 ?

Answer 1

2/3 rd of 7/8 = 2/3*7/8 = 14/24 = 7/12

so, 7/12/x = 2
    so, 7 = 24x
      so, x = 7/24

Answer 2

Let the number be a

$\frac{2}{3} \times \frac{7}{8} \times a = 2 \\ \frac{7}{12} \times a = 2 \\ a = 2 \times \frac{12}{7} \\ a = \frac{24}{7}$
Required number = 24/7