Which one i greater 2/8 or 1/2 ?

1. what is the formula for finding the vertical distance between two points on a coordinate plane?

Noor brought 21 sheets of stickers. she gave 1/3 of a sheet to each of the 45 students at recess. she wants to give teachers 1 1/2 sheets each.

Find the midpoint m of z1=(8+5i) and z2=(12+3i)