Decimaly or Decimally: How To spell?
The word Decimaly is misspelled against Decimally, an adverb meaning "By tens; by means of decimals."
Decimally has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings decima & y which should not be misspelled with single 'L'
Wrong Spelling:  decima-l-y  Correct Spelling:  decima-ll-y 
Find more wrongly spelled words of Decimally to spell it well.