Question

Three parts of nitrogen and five parts of phosphorus were mixed as a fertilizer for farmer Ted’s pasture. Which fraction represents the ratio of nitrogen in farmer Ted's fertilizer? A) 3/5 B) 3/8 C) 5/3 D) 8/3

Answer 1

Three parts of nitrogen plus five parts of phosphorous gives you a total of 8 parts (3+5=8).  Nitrogen makes up only three of those eight parts, or 3/8. The correct answer is B) 3/8.