It depends on the size of the tile. Tiles come in many different sizes. They are generally sold though by the square foot.
The general rule goes that for every tile floor you will have around 10% waste. Meaning that you will need 100 tile for the floor and 10 more for cuts and breaks you might have.
When you buy these tiles, tell the sales person you need 110 square feet and this already includes waste.
You would need 56 tiles to do the floor
6.75 Tiles
16 square tiles
each tile is one square foot so you need 55 tiles
585
You would need 56 tiles to do the floor
123 tiles
forty
6.75 Tiles
16 square tiles
400
each tile is one square foot so you need 55 tiles
about 28
585
24 of them.
100
Assuming the tiles are 1 foot squares, you would need 10*15 = 150 tiles.