a.
2dam2 = 200 m2 3dam215m2 = 315 m2
200m2 = 2 dam2 30hm2 = 3000 dam2
12hm2 5dam2 = 1205 dam2 760m2 = 7 dam2 60 m2.
b.
1m2 = $\frac{1}{100}$ dam2 1dam2 = $\frac{1}{100}$ hm2
3m2 = $\frac{3}{100}$ dam2 8dam2 = $\frac{8}{100}$ hm2
27m2= $\frac{27}{100}$ dam2 15dam2 = $\frac{15}{100}$ hm2.