345 balloons.
I hope that answers your question.
You will need 3 graduation prom After party If you dont get an after party than 2
258 helium filled balloons filled to 34 psi each
there are many different types: hot air balloons, gas balloons, party balloons, weather balloons and many more complex types of balloons.
486/18 = 27 ballons each
99
5672-
3060 balloons
26 clowns
easy, divide 486 by 18, i could do that without a calculator if i could be bothered, but by using a calculator, it is 27 balloons each.
A teen will need a formal dress for prom. Prom is a very formal affair for high school students that allows them the chance to dress up more formally than usual.
* While it would be nice to have a date no, you don't need a girlfriend to go to a prom. Many teens go as a group and some have girlfriends and others don't. You can also bring a best female friend with you or just go in a group.
so it will fly.