What is 3/10 minus 9/8?
Here we will show you how to calculate 3/10 minus 9/8. We will give you the answer in fraction form and in decimal form.
We label the numbers in 3/10 minus 9/8 like this:
3/10 - 9/8 = 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 3/10 minus 9/8 into the formula above, we get:
(3x8 - 10x9) / 10x8
(24 - 90) / 80
-66/80
Thus, the answer to 3/10 minus 9/8 (simplified if necessary) in fraction form is as follows:
-33/40
To get the answer to 3/10 minus 9/8 in decimal form, we simply divide the numerator by the denominator from our fraction answer:
-66 / 80 = -0.825
Note: The fraction answer is exact, but the answer in decimal format is rounded to the nearest 4 decimals if necessary.