Japanese commonly uses Arabic numerals, so you could just write 69. If you wanted to be a bit more traditional, you could write 六十九. Both of these are read as "roku-juu-kyuu".
69.69
69% is 0.69.690.69
69 hundredths = 0.69
69 Japanese yen = 0.8963 US dollars
69 is an integer, not a fraction.
69/10 as a decimal is 6.9
モスクエダ this is how you write mosqueda in Japanese
69 = 6,900% (multiply decimals by 100 to get percent).
LXIX
Japanese
69%
0.69 = 69/100