A memoir is a biography which is a historical written account based on personal knowledge or special sources. Since it is considered a biography, the point of view that is used in a memoir is first-person point of view. In the first person point of view, the pronouns that can be used are I, me, my, mine, we, us, ours, and our.
The correct answer is "lesser than the whole number"
If you take for example 1/2 x 2 = 1.
This is because one half of 2 is 1, meaning the result is a number smaller than the whole number used.