The answer will depend on whether you want percentage equivalents of rational numbers or one rational number as a percentage of another.
Multiply by the number of equivalents per mole.
There are no equivalents. Every number has only one Roman numeral to it.
Translating chinese into its english equivalents is difficult. You can translate them by looking into books or you can use a translator on the internet.
Not sure if this is what you're looking for - but check out the related link. Scroll down about a page length - and there's a number of conversion tables listed.
0.25 IS a decimal number and has only trivial equivalents.
10011101: Decimal = 157 Hexadecimal = 9D
1/4, 2/8, 3/12, etc. Just multiply numerator and denominator of 1/4 by the same number to get more equivalents.