Add a zero to the right of the digit in the tenths decimal place if the value has no digit in the hundredths decimal place; otherwise, leave the original digit in the hundredths decimal place unchanged. For example, if the decimal is 0.6, rewrite it as 0.60. For the decimal number 0.75, the number would be left alone.
Move the decimal point after the digit in the hundredths decimal place if the value has more than two digits after the decimal; if it has only two digits after the decimal, then lose the decimal point altogether. For example, the decimal 0.755 becomes 75.5, though the decimal 0.55 would just become 55.
Write the percent sign "%" after the number. For both the preceding examples, 0.755 would become "75.5%" and 0.55 would become "55%."