Holly's soccer team is trying to raise $2,100 to travel to a tournament in Florida, so they decided to host a pancake breakfast. Each person must pay $30 for the breakfast. How many people need to attend their breakfast in order to raise $2,100?

To raise $2,100, they need 2100 / 30 = <<2100/30=70>>70 people to attend the breakfast. Answer: \boxed{70}.