Assuming 17x17 refers to measurement in inches,
a 17"x17" tile will cover 17/12 x 17/12 sq ft = 2.0069 sq ft
Then covering 427 sq ft will require 427/2.0069 = 212.76 = 213 tiles.
This number assumes there are no breakages, there is no wastage and that every offcut is used.
Tiles that are two feet on a side cover 4 square feet. 378 of them cover 1512 square feet.
67 tiles.
76.6 tiles
How many 24x24 tiles it take to cover a 14×14 room
You will need at least 67 tiles. This will cover 150.75 square feet.
Tiles that are two feet on a side cover 4 square feet. 378 of them cover 1512 square feet.
192 tiles
67 tiles.
76.6 tiles
190
Two tiles will suffice since they will cover 36 square feet.
Since a 12x12 tile is one square foot, then 38 12x12 tiles will cover 38 square feet.
500/1.78 = 281 tiles
start with 38 tiles.
How many 24x24 tiles it take to cover a 14×14 room
Each tile covers 4 square feet. You will need 24.75 tiles to cover the area.
You will need at least 67 tiles. This will cover 150.75 square feet.