Eve and her brother made 1/2 of a gallon of lemonade to sell . They divided the lemonade equally among 3 paper cups. How much lemonade was in each paper cup?

Question

it is multiply and divide rational numbers 

Answer 1

Not all that tough, really! Start with the lemonade they have, 1/2 gal . dividing it means literally that: divide the 1/2 gal by the 3 paper cups:

(1/2 gal) / (3 paper cups)

Treat the 3 as a fraction, 3/1. We divide by fractions by flipping an dmultiplying:

(1/2 gal) * (1 /3 paper cups)

(1/6) gal per paper cup