Early Quenya
lempea
adjective. half
lempea
adjective. decimal
lempe
cardinal. five
lemya
adjective. half
tuksa lempea
noun. hundred
tuksa pínea
noun. hundred
leminya
ordinal. fifth
lenya
adjective. half
There are more words but they are from Tolkien's earlier conceptional periods. Tolkien likely changed these words as he evolved the aesthetics and completeness of the languages. You may even find languages that Tolkien later rejected. Do not mix words from different time periods unless you are familiar with the phonetic developments.
Below: Tolkien's Late Period (1950–1973). These are from Tolkien's late conceptual period — his most settled forms of the languages. Prefer these over the earlier ones above when composing new text.