How to make a fraction on a graphing calculator ti-83

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?

Let hh represent the number of hummingbirds and ss represent the number of sunbirds that must pollinate the colony so it can survive until next year. 6h+4s > 746h+4s> 74 this year, 88 hummingbirds pollinated the colony. what is the least number of sunbirds that must pollinate the colony to ensure that it will survive until next year?

Describe how you can act financially responsible.