Martin is laying out a design for the tiles on a section of his bathroom floor. He will use 1 black tile for every 4 white tiles to have total of 20 tiles in the design. How many of each type of tile will Martin use?

Step-by-step explanation:

Given

Required

Determine the number of each type used

Convert each ratio to fraction.

For Black, we have:

For White, we have:

The number of tiles for each is then calculated as:

a

step-by-step explanation:

2/3=10/15

1/5=3/15

10+3=13/15

2 13/15 is the answer