Question

Mrs. Blake's bill at a restaurant was $42.75. She wants to leave the waiter an 18% tip. How much will she pay in all, including tip?

Answer 1

The quick way to do this is to multiply the bill by 1, mult. it again by 0.18, and then add the two results together.  

Better and faster:  Mult. the bill amount ($42.75) by 1.18:

1.18($42.75) = $50.45 (answer)