This is not possible. You have to be able to divide the two numbers evenly.
An equivalent fraction for one fifth would be two tenth if you multiply it by two.
12fith
two fifths, one fifth
one fifthone fifth
11/5
One fifth
Two fifths, as a fraction, is equivalent to four tenths, which is .4 as a decimal. Two fifths, as a percentage, is 40%.
12/162
2/5
11/5
There are many fractions that are equal to one fifth. To find them, you multiply any whole number, (1/5 times 2) and find the answer. (2/10) When you reduce two tenths, (or any fraction) divide 2/10 by 2 and get 1/5. Two tenths and one fifth are equal.
The fraction two-thirds is already in its simplest form.