Answer:

the cook book cost ₱324

Step-by-step explanation:

(9/10) x 360 or

change the 9/10 to decimal showing

0.9 x 360 the product is 324 same as (9/10) x 360 = 324 so the answer is 324

either you do the decimal way or the fraction the answer is still the same

0.9 x 360=324=(9/10) x 360

Answer:

1/400

Step-by-step explanation:

by dividing 9/10 to 360