round 0.8394263 to the nearest hundred-thousndth.

Add the fractions 2/3,3/8 and 5/12 reduce to lowest terms
subtract the fraction 7 4/ from 18 6/15 reduce answer in lowet terms

I'll do one of these. Which problem would you like me to do for you?

I'll be glad to check your answers.

add thee fractions 2/3,3/8, and 5/12 reuce to lowest terms. i know they need a common demonitor.

The least common multiple of 3, 8, and 12 is 24.

2/3 = 16/24
3/8 = 9/24
5/12 = 10/24

16/24 + 9/24 + 10/24 = 35/24 = 1 11/24

To round 0.8394263 to the nearest hundred-thousandth, we need to identify the digit in the hundred-thousandth place. In this case, the digit in the hundred-thousandth place is 9.

The digit to the right of the hundred-thousandth place is 2, which is less than 5. Since the digit is less than 5, we can simply drop all the digits to the right of the hundred-thousandth place, resulting in 0.83942 as the rounded number to the nearest hundred-thousandth.

Next, let's add the fractions 2/3, 3/8, and 5/12 and reduce the result to lowest terms.

To add fractions, we need to have a common denominator. In this case, the least common multiple (LCM) of the denominators 3, 8, and 12 is 24.

Converting each fraction to have a denominator of 24:
2/3 = (2/3) * (8/8) = 16/24
3/8 = (3/8) * (3/3) = 9/24
5/12 = (5/12) * (2/2) = 10/24

Now we can add the fractions:
16/24 + 9/24 + 10/24 = 35/24

To reduce the fraction to lowest terms, we find the greatest common divisor (GCD) of the numerator and denominator, which is 5 in this case. Dividing both the numerator and denominator by 5:
35/24 = (35/5) / (24/5) = 7/5

So, the sum of the fractions 2/3, 3/8 and 5/12, reduced to lowest terms, is 7/5.

Lastly, let's subtract the fraction 7 4/ from 18 6/15 and reduce the answer to lowest terms.

First, convert the mixed numbers to improper fractions:
7 4/ = (7 * 15 + 4) / 15 = 109/15
18 6/15 = (18 * 15 + 6) / 15 = 288/15

Now, subtract the fractions:
288/15 - 109/15 = (288 - 109) / 15 = 179/15

To reduce the fraction to lowest terms, we find the GCD of the numerator and denominator, which is 1 in this case. Dividing both the numerator and denominator by 1:
179/15 = (179/1) / (15/1) = 179/15

So, the result of subtracting the fraction 7 4/ from 18 6/15, reduced to lowest terms, is 179/15.