Help with my science homework?

Question

In a 12 square meter area of weeds, there are 46 dandelion plants, 212 grass plants, and 14 bindweed plants. What is the population density per square meter of each species? Please help me! At least tell me how to figure it out! Thanks!

Answer 1

Number of plants,N=46+212+14

                                     =272 plants

Area.A=12 square meter

population density per square meter 

d=N/A

 =272/12

 =22.67  per square meter of each species