Question

An insecticible contains 85 centigrams of inert ingredient for every 1 centigram of active ingredient. if a quantity of the weighs 688 centigrams, how much of each type of ingredient does it contain?

Answer 1

(85/86)*688 cg = 680 cg . . . inert ingredient
.. 688 cg -680 cg = 8 cg . . . .active ingredient