Question

What should be divided by 1 3/4 to get 2 1/2?

Answer 1

let x be the required no.

ATQ

$x \div 1 \frac{3}{4} = 2 \frac{1}{2} \\ x \div \frac{7}{4} = \frac{5}{2} \\ x = \frac{5}{2} \times \frac{7}{4} \\ x = \frac{35}{8}$