Choose the fraction that goes in the blank? 1/2 < _ < 4/5

i don't understand how they got 2/3

Janie has $3. she earns $1.20 for each chore she does and can do fractions of chores. she wants to earn enough money to buy a cd for $13.50. write an inequality to determine the number of chores, c, janie could do to have enough money to buy the cd.

Seymour is twice as old as cassandra. if 16 is added to cassandra’s age and 16 is subtracted from seymour’s age, their ages become equal. what are their present ages? show !

1yd 1 ft = 1 1/12 1 1/3 1 1/2 1 1/6