How do you change a decimal into a fraction?

Question

that is by hand, no calculator. As in, if you have the number 1.8, how do you change it into a fraction?

Answer 1

The first number would be a whole number. The .8 would be 8 over 10. So: 1 8/10, which could go down to 1 4/5.
You would always take the first number after the decimal and put that over 10, the second number over 100, etc.

Answer 2

1.8 can be written 1+8/10, which is a mixed number, or 18/10, which is an "improper" fraction. In general, converting decimals to fractions is done by writing the number without the decimal point as the numerator and 1 followed by n zeros, where n is the number of decimal places.

MY math teachers would have boxed Tmitchells' ears! Yes, literally!

You specified fraction, not mixed number.

Answer 3

Take it from a math teacher. The first poster was correct 1.8 is equal to 1 and 8/10 Any number before the decimal point represents a whole number and should be written as such. If there is one number after the decimal point that number goes over ten, if there is two numbers it goes over 100, and three numbers go over 1,000 etc... Also if you have a number like 1.03 it would be 1 and 3/100 this is read one and three hundreths

Answer 4

Its actually not so simple as it seems. But clear vision & logic can give u the exact way. Here is wht u want.

Lets consider a decimal number which will be simple to understand lets take it 0.5
Now while converting fraction into decimal what we do 1/2. that means u divided 1 by 2. Now to attain answer from question we have to reverse the process.
Here division took place & its reverse is multiply. so we multiply 0.5 with 10 now u may also consider 0.5 as 0.50 but in that case we can multiply by 100.
Reason for that is now lets consider 0.52 to remove decimal i have to multiply by 100 then 0.52X100=52.0 that is "52", similarly 0.5X10=5. But to equilize the actual equation we have to keep the value of equation the same so we not only multiply the number by 10 we also divide it.which actually become 0.5X(10/10) that keeps the value same.
Hence after applying this method fraction can be recovered by decimal as we are actually reversing the process.

Answer 5

it will be 18/10
you remove the decimal and divide by
a multiple of 10 which has the same no of
zeros as the no of digits after the decimal
now cancel and get the answer as 9/5

Answer 6

1.8 = 1 + 8/10 ths convert the 1 to 10/10 ths add them together and you get 18/10ths That could be reduced to 9/5 ths

Answer 7

You multiply it in this case by 10, put ithe result in the numerator and put 10 as the denominator.

It become 18/10 divide up and down by 2
then you can simplify it to 9/5

Answer 8

very easy answer...

.5 is in the tenths column so you put 5 over 10 which equals 1/2
.05 is in the hundreths column so you put 5 over 100 which equals 1/20. .23 turns into 23/100 and .0002 turns into 2/10000 or 1/5000.

Answer 9

1.8 would be 18/10