The instructions state that Cheryl needs 2/9 square yards of one type of material and 1/8 square yards of another type of material for a project. She buys exactly that amount. After finishing the project, however, she has 4/18 square yards left that she did not use. What is the total amount of square yards of material Cheryl used? Choose the correct choice:
A) 1/12
B) 1/9
C) 1/8
D) 1 1/9
E) 2 1/9
Total bought = 2/9+1/8   left part 4/18---&gt;2/9   so used part 2/9+1/8-2/9=1/8   ANSWER:1/8
<result>C</result>
The instructions state that Cheryl needs 2/9 square yards of one type of material and 1/8 square yards of another type of material for a project. She buys exactly that amount. After finishing the project, however, she has 4/18 square yards left that she did not use. What is the total amount of square yards of material Cheryl used?