andy cut a tuna sandwich and a chicken sandwich into a total of 15 same-size pieces. he cut the tuna sandwich into 9 more pieces than the chicken sandwich. andy ate 8 pieces of the tuna sandwich. what fraction of the tuna sandwich did he eat?
First of all, he cut 12 tuna sandwich pieces and 3 chicken sandwich pieces. Then, if he eats 8 pcs. of the 12 pcs. of total tuna sandwich pcs., then he has eaten 8/12 which is 2/3 simplified.
