When multiplying fractions do you multiple it like this: 5/6 × 7/8 35/48 and if you are multiplying fractions with the same denominator do you multiply like this: 5/8 × 6/8= 30/8 or do I solve it like this: 9/10×3/10= 27/100? I am very confused please help.​

Sherrie is baking a pie for her family. she leaves the room and comes back to 35% of the pie having been eaten before she can put the topping on. how much 1 square inch strips of dough will she need for the top, now that a portion is missing? round your answer to the nearest while nimber.