CONVERTING DECIMAL TO FRACTION
Example: Change 12.2 to fraction
1. Make 12.2 into a whole number.
In this case, multiply 12.2 by 10.
2. Whatever is multiplied to 12.2 should also be divided to it so as not to change the value of 12.2.
Therefore:
12.2 * 10/10 = 122/10 or 61/5 in fraction in lowest term
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0.4 as a fraction and decimal
A decimal number is one in which the place value of each digit is ten times the place value of the digit to its right. (... , thousands, hundreds, tens, units, tenths, hundredths, ... ) A decimal point is used to separate the units from the tenths. If a number in decimal form has non-zero digits after the decimal point then it is a decimal fraction. [There is one esoteric exception: if the decimal point is followed by an infinite string of 9s, then it is not a decimal fraction.] Thus 37.6 is a decimal fraction 0.6 is a decimal fraction 0.00000063 is a decimal fraction 37 is not a decimal fraction. 37.0 is not a decimal fraction. 37.999... recurring is no a decimal fraction [it is in fact = 38].
930 is not a fraction but as a decimal, it is 930
That already is a decimal fraction.
It is called a decimal fraction.