If you multiply two decimals less then 1 can you predict whether the product will be less then either of the factors?

Yes, if you multiply two decimals that are both less than 1, the product will always be less than either of the factors. This is because multiplying two fractions (or decimals) that are both less than one results in a smaller fraction. For example, multiplying 0.5 by 0.3 yields 0.15, which is less than both 0.5 and 0.3.