What is the ratio of production of Company B in the year 2006 to production of Company B in the year 2008?

Answer: Option C

Production of Company B in 2006
= $$\left(\frac{4}{5}\text{ of }750\right)\text{tonnes}$$
= 600 tonnes
Production of Company B in 2008
= $$\left(\frac{4}{3}\text{ of }600\right)\text{tonnes}$$
= 800 tonnes
∴ Required ratio
= 600 : 800
= 3 : 4