To convert 6.27 to percent multiply by 100: 6.27 × 100 = 627 %
A percent is simply a proportion out of 100.
The percentage is 100 times the proportion.
You can make the proportion into a percent by dividing the numerator by the denominator and then moving the decimal point two spaces over to the right. That's your percent. Also if the denominator is a factor of 100, you can set it to a hundred. Example: 2/5=40/100. So the percent is 40%, the numerator over 100.
Converting a ratio to a percent is not the same as solving a proportion.
It is the value which represents the proportion as a part of 100.