I'm having trouble putting these least to greatest 6 and 9/10 , 6 and 19/80 , 6 and 3/4

To put these numbers in least to greatest order, we need to compare the whole number part first, and then the fraction part.

1. Start by comparing the whole number parts: All three numbers have a whole number part of 6, so they are equal in this respect.

2. Next, compare the fractions. To compare fractions with different denominators, we need to find a common denominator. The least common multiple (LCM) of 10, 80, and 4 is 80.

3. Convert the fractions to have the common denominator of 80:
- 9/10 can be multiplied by 8/8 to get 72/80
- 19/80 remains the same
- 3/4 can be multiplied by 20/20 to get 60/80

Now we have:
- 6 and 72/80
- 6 and 19/80
- 6 and 60/80

4. Finally, arrange the fractions in ascending order:
- 6 and 19/80
- 6 and 60/80
- 6 and 72/80

So, in order from least to greatest, the numbers are: 6 and 19/80, 6 and 60/80, 6 and 72/80.