For each 15 mm of coloured fabric Gavyn uses to make his curtains, he also uses 2 cm of white fabric. Express the amount of white fabric to coloured fabric as a ratio in its simplest form.

4:3

Step-by-step explanation:

We are told that For each 15 mm of coloured fabric Gavyn uses to make his curtains, he also uses 2 cm of white fabric.

Let's convert the 2cm to mm to make it uniform units.

We know that 1 cm = 10mm

Thus, 2cm = 20 mm

Thus,

For each 15 mm of coloured fabric Gavyn uses to make his curtains, he also uses 20 mm of white fabric.

Thus for a ratio of white fabric to coloured fabric, this gives;

20:15

Common factor is 5,so it can be simplified as; 4:3

the simplified form is

step-by-step explanation:

we want to simplify the expression,

let us change the middle bar to a normal division sign to obtain,

we multiply the first fraction by the reciprocal of the second fraction to obtain,

we factor to obtain,

we cancel the common factors to get,

we simplify to get,

the correct answer is b