A school needs 75 light bulbs. Bulbs come in a package of 8. How many packages should the school order

9.375 or 9 (rounded) 

75 / 8 = 9.375. But, since 9 x 8 = 72, then to have 75 you will need 10 package of 8 each or 80 light bulbs. Then 80 - 75 = 5 left over, or 5 spare light bulbs.