Is 0.1 million singular or plural? [closed]
Solution 1:
In your question, 0.1 million signifies how many people are above 65. The plurality is for people which is the noun here. 0.1 million is just a qualifying number, it is neither singular nor plural.
Solution 2:
As a general rule, if you're dealing with countable items, then anything other than 1 is plural, and will use the plural form of the verb.
You should also use plural for fractions that are greater than one. You will say 1.5 kilograms, not 1.5 kilogram. (There seems to be a grey area for fractions less than 1 though; see this discussion).