Source : Webster's Revised Unabridged Dictionary (1913)

Decimalize \Dec"i*mal*ize\, v. t.
   To reduce to a decimal system; as, to decimalize the
   currency. -- {Dec`i*mal*i*za"tion}, n.

Source : WordNet®

decimalize
     v 1: change from fractions to decimals; "Stock prices will be
          decimalized in the year 2000" [syn: {decimalise}]
     2: change to the decimal system; "The country decimalized the
        currency in 1975" [syn: {decimalise}]