A decimal to a percent is fairly easy.
Take a decimal such as, 0.15.
To find the percent, move the decimal point, 0(decimal point)15, all the way to the right.
You will have 015.
This can be turned to a percent by adding the percent sign.
I'm not even 13 so hope this helped at all!
By the way, this is MathPeacock, forgot to sign in.