The following table gives the details of Five commodities A, B, C, D and E with quantity required and their costs for a family in a month. Study the table and answer the questions that follow.

The percentage of increase(per kg) in the rate of commodity D from 2016 to 2019 is :

13.33%

Rate of D in 2016 = 40 × 75 = 3000

Rate of D in 2019 = 40 × 85 = 3400

Percentage increase in rate of D from 2016 to 2019 = \(\frac{3400 - 3000}{3000}\) × 100

= \(\frac{400}{3000}\) × 100

= 13.33%