Question

2/5 of a number - from 3/4 of it = 56 find the number

Answer 1

let number be x
$\frac{2x}{5} - \frac{3x}{4} = 56 \\ \frac{8x-15x}{20} = 56 \\ x = \frac{56*20}{-7} \\ x = - 160$

Answer 2

Your answer = 560
You can see the solution in the pic.