I need help fast thanks

The appalachian trail is a hiking trail that passes through the appalachian mountains. three members of a teen hiking group hiked a section of the trail. the hikers stopped at a rest area and equally shared 3 4 gallon of water. how much water did each person get?

27 is what percent of 108? 27 is % of 108

What is the number 321,000,000 in scientific notation? also what is the number? ?