The question cannot be answered because a number of key items of information are missing:
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].
twenty-one hundredths is;= 0.21 in decimal= 21/100 in fraction
seven and thirty one thousandths= 7.031 in decimal= 7031/1000 in decimal fraction
The decimal is 17, the fraction (if you must have one) is 17/1
To get the decimal, divide the numerator of the fraction by the denominator. If the decimal runs to more than one place, then you have to round it to one decimal place.
Though there are an unlimited amount of ways to show a fraction as a decimal. There is only one way to turn a fraction into a decimal.
One-fourth as a decimal is 0.25. As a fraction it is 25/100 or 1/4.
one quarter: = 1/4 in fraction = 0.25 in decimal = 25% in percentage
The decimal equivalent of the vulgar fraction 1/5, or one fifth, is equal to 0.2.
It is a decimal fraction.
As a decimal it is 7. It is not really a fraction but, if you must write it as one, it can be represented by 7/1.
.2