Difference between 1/9 and 1/2

7/18

Step-by-step explanation:

To find the difference between numbers, subtract. Since we have fractions, we need a common denominator to be able to subtract.

The LCD of 2 and 9 is 2 * 9 = 18

18/2 = 9

18/9 = 2

1/2 - 1/9 = (9 * 1)/(9 * 2) - (2 * 1)/(2 * 9) = 9/18 - 2/18 = 7/18

-7/18

Step-by-step explanation:

By add or subtracting fractions, you need to equalize the denominator.

To transform all denominators of 1/9 an 1/2 to the single value of 18, their LCM, we multiply a fraction by x/x where x=LCMy, where y is the denominator of the fraction being transformed.

In this case:

1/9 *2/2 = 2/18

1/2 *9/9 = 9/18

So the difference between 1/9 and 1/2

1/9 - 1/2

2/18 - 9/18

-7/18

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have