Question

5/9 of a piece of metal has mass 7 kg. what is the mass of 2/7 of the metal?

Answer 1

Let the metal mass be x.

Given (5/9) * x = 7

            5x = 63

           x = 12.6.


Then the mass of 2/5 of the metal = 2/5 * 12.6

                                                           = 5.04.


Hope this helps!

Answer 2

5/9 of a piece of metal has mass =7kg
complete metal has mass =7×5/9
2/7 of a piece of metal has mass=35/9 ×7/2
=5/18ans