Math Problem PPM

[a666shadow]

In a factory there were produced 57690Kg of dog dry food and they used for the process 11.5kg of antioxidant. 36229Kg were produced with normal PPM and 21461Kg were produced with double PPM.
How much antioxidant was used for normal PPM and how much for double PPM?

 

[tkhunny]

Rule of Thumb: If you don;t know something's value, give it a name.

A = Amount of anti-oxidant used per kg of Normal PPM dog food.

There, you're about half done.