Given a standard 52-card deck, what is the probability of drawing a diamond? in a fraction

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

If the measure of xyz is 81 what is the measure of yz

All per-unit concepts rely on ratios, meaning, to provide a type of measurement