what is the least and greatest of 1\5 and 3\5 and 2\5?

think in terms of "fifths"

what's the greatest of 1,3,2?

To find the least and greatest values among the fractions 1/5, 3/5, and 2/5, we can compare the fractions by converting them to decimals.

1/5 as a decimal is 0.2.
3/5 as a decimal is 0.6.
2/5 as a decimal is 0.4.

Now, we can see that the least value is 0.2, which corresponds to the fraction 1/5. On the other hand, the greatest value is 0.6, which corresponds to the fraction 3/5.

Thus, the least fraction is 1/5 and the greatest fraction is 3/5.