What is 50% 10% 6% 65% as a fraction in simplest form?

Keisha makes a large sandwich for a family picnic she takes 1/2 of them the sandwich to the picnic her family eats 3/8 of the whole sandwich what fraction of the whole sandwich does keisha bring back from the picnic

Module 10 coordinate proof using slope and distance answers is quadrilateral abcd a parallelogram? explain how you know.

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?