use multiplying by 1 to find an expression, equivalent to 2/9 with a denominator of 18y

2/9 * 2y/2y = 4y/18y

2/9 * 2y/2y = 4y/18y

To find an expression equivalent to 2/9 with a denominator of 18y using the concept of multiplying by 1, we can manipulate the fraction by multiplying both the numerator and denominator by the same value which equals 1.

In this case, we need to multiply by a value that will result in a denominator of 18y. To achieve this, we can multiply by (2y)/(2y) since multiplying any number by 1 does not change its value.

Let's perform the calculations step by step:

Starting with 2/9:

(2/9) * (2y)/(2y)

Now, we multiply the numerators and the denominators:

= (2 * 2y) / (9 * 2y)

Simplifying further:

= 4y / 18y

Finally, we can simplify the fraction by canceling out the common factor of y:

= 4 / 18

So, the expression equivalent to 2/9 with a denominator of 18y is (4 / 18).