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What is 0.3 repeating as a fraction in simplest form?
##0.bar3 = 3/9 = 1/3##
To convert a recurring decimal to a fraction:
Let ##x = 0.333333..." "larr## one digits recurs
##10x= 3.3333333...##
##9x = 3.0000000...." "larr## subtract ##10x-x##
##x = 3/9 = 1/3##
If 2 digits recur : for example ##0.757575...##
##" "x = 0.757575...## ##100x = 75.757575...." " larr ##subtract ## 100x-x = 99x##
##99x = 75.00000...##
##x = 75/99##
##x = 25/33## ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ It is a good idea to know the conversion of some of the common fractions to decimals by heart.
This includes: ##1/2 =0.5" "1/4 = 0.25" "3/4=0.75##
##1/5=0.2" "2/5=0.4" "3/5=0.6" "4/5=0.8##
##1/8=0.125" "3/8=0.375" "5/8=0.625" "7/8=0.875 ##
These are all terminating decimals.
The recurring decimals which are useful to know are:
##1/3 =0.3333..." "2/3 = 0.6666....##
##1/6 = 0.16666..." "5/6 = 0.83333...## ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~