The total domestic consumption of rice in 2017 and 2019 was what percentage more than the total exports of wheat in 2016, 2017 and 2020? (Correct to one decimal place)

Total Domestic consumption of Rice in 2017: 72% of 200 = 144
Total Domestic consumption of Rice in 2019: 52% of 300 = 156
Adding them up we get,  300 million tonnes.

Exports of wheat in 2016, 2017 and 2020 are
$$\left(32\%\ of\ 250\right)+\left(40\%\ of\ 180\right)+\left(30\%\ of\ 360\right)$$
= $$80+72+108$$
= $$260\ $$ million tonnes

Calculating the domestic rice consumption to the wheat export we get, $$\frac{300}{260}=\ 1.1538$$
Which means the domestic consumption is 15.38% higher. 
Rounding it to one decimal place gives us, 15.4%
Hence, option C is the correct answer.