What is 8/7 minus 3/9?
Here we will show you how to calculate 8/7 minus 3/9. We will give you the answer in fraction form and in decimal form.
We label the numbers in 8/7 minus 3/9 like this:
8/7 - 3/9 = 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 8/7 minus 3/9 into the formula above, we get:
(8x9 - 7x3) / 7x9
(72 - 21) / 63
51/63
Thus, the answer to 8/7 minus 3/9 (simplified if necessary) in fraction form is as follows:
17/21
To get the answer to 8/7 minus 3/9 in decimal form, we simply divide the numerator by the denominator from our fraction answer:
51 / 63 = 0.8095
Note: The fraction answer is exact, but the answer in decimal format is rounded to the nearest 4 decimals if necessary.