166. Fractions are formed from the cardinals by the use of the suffix
"-on-" followed by the ending "-o". Adjectives and adverbs may be
derived from these by use of the endings "-a" or "-e":
La duono de ses estas tri, the half of six is three.
Li estis nur duone atenta, he was only half attentive.
La triona parto de ses estas du, the third part of six is two.
Dek unu dekduonoj, eleven twelfths.
Mi dudekone finis la laboron, I one-twentieth finished the work.