i think first you must Unification of denominatorsit will 60 for (3,4,5) so you will get 2\5 = 24\60 1\4 = 15\60 1\3 = 20 \60 then you divide each one apart then multiply by total number (3,800) so : 24\60 * 3800 = 1520 15\60 * 3800 = 950 20 \60 * 3800 = 1267 _____ note : when you will gather results you will get Approximate number to 3800