text: Try to understand the logic. Let the two numbers be x and y.\nx/ y = 4/7 => 7x = 4y\nFrom this y is bigger than x.\n\ny-x = 39 (difference is 39)\n7y-7x = 7*39\n7y - 4y = 7*39\ny = 7*39/3 = 91 and\nx = 91 - 39 = 52\n\nHope you got this.\n\nFor the second part, \nuse these\n1 m = 100 cm = 1000 mm\n1 kg = 1000 g\n1 cm = 10 mm\n1 km = 1000 m\n\nThese are not difficult, but I suggest you try yourselves instead of putting all homework questions on these. You can contact me on IM/mail for further help.