Convert fractions to decimals by taking the numerator (top digit) and dividing it by
the denominator (bottom digit).
Example: ½ means that 1 is divided by 2. So we take 1 and make it 1.0 and
then divide it by 2 which gives us .5
Most Important Conversions
Halves
1/2= .5
Thirds
1/3 = .333
2/3= .666
Fourths (think of quarters)
1/4= .25
3/4= .75
Fifths (for each 1/5 you have, add .2)
1/5= .2
2/5=.4
3/5=.6
4/5=.8
3/10=.3 (etc)
10/10=1.0
Tenths (numerator with a decimal before it)
1/10= .1
2/10=.2
Additional Conversions
Sixths (repeating decimals)
1/6= .166
5/6= .833
Sevenths (nastiest denominator to memorize)
1/7= .14
5/7= .614
2/7= .285
6/7=.875
3/7= .42
4/7=.57
Eighths (every 2/8 is a quarter, a quarter cut in half is .125, combine those two ideas )
1/8= .125
5/7= .614
3/7= .375
6/7=.875
5/8= .625
7/8=.875
Ninths (very easy!! Numerator is the repeating decimal )
1/9= .111
7/9= .777 (etc.)
Elevenths (easy!! It’s a repeating decimal where numerator multiplied by 9)
1/11= .0909
5/11= .4545
9/11= .8181
10/11= .9090