$ 400 is divided amongst a , b and c so that a may get 2 / 3 as much as b and c together , b may get 6 / 9 as much as a and c together , then the share of a is
"a : ( b + c ) = 2 : 3 a ' s share = 400 * 2 / 5 = $ 160 answer is c"
multiply(divide(400, add(divide(2, 3), const_1)), divide(2, 3))