That´s quite difficult to know for sure given the fact that we probably only know about 10% (probably even less) of the species of dinosaurs that ever existed. To try to get an idea you should think that there are more herbivores than carnivores (think of the energy pyramid) today and this has always been true in order to keep the balance in the different ecosystems. Now, mammals are like the group of animals that replaced dinosaurs in their different niches. Find out how many herbivorous mammals there are today (include the extinct ones) and you may get an idea of how many herbivorous dinosaurs there were.
Carnivores
Brontosaurus
yes most dinosaurs ate plants
the meat eating or carnivours dinosaurs were the smartst. the meat eating or carnivours dinosaurs were the smartst.
Plant eating dinosaurs foraged for food. Carnivorous dinosaurs hunted for prey.
Just like we did, by eating and digesting!!!
Yes their were they are known as omnivores.
Plant eating dinosaurs, or herbivores, were more prominent than meat eating dinosaurs. Some included sauropods, hadrosaurs, stegosaurs and ornithopods.
Depends on what plant eating dinosaur you refering to Plateosaurus is one
The mass extinction of dinosaurs were caused volcanoes that cause global warming with their toxic gases, therefore, killing the plants, starving the plant eating dinosaurs to death, and with no more plant eating dinosaurs, the meat eating dinosaurs died, too.
Teeth
There are several herbivorous dinosaurs, like the sauropods and the ceratopsians. Their teeth weren't as sharp as the teeth of carnivorous dinosaurs.