What is 9/10 minus 10/9?
Here we will show you how to calculate 9/10 minus 10/9. We will give you the answer in fraction form and in decimal form.
We label the numbers in 9/10 minus 10/9 like this:
9/10 - 10/9 = A/B - C/D
We will use a formula that does not require you to find the lowest common denominator to find the solution. The formula is:
(AD - BC) / BD
When we fill in 9/10 minus 10/9 into the formula above, we get:
(9x9 - 10x10) / 10x9
(81 - 100) / 90
-19/90
Thus, the answer to 9/10 minus 10/9 (simplified if necessary) in fraction form is as follows:
-19/90
To get the answer to 9/10 minus 10/9 in decimal form, we simply divide the numerator by the denominator from our fraction answer:
-19 / 90 = -0.2111
Note: The fraction answer is exact, but the answer in decimal format is rounded to the nearest 4 decimals if necessary.