$84=x%($551)
What percentage of $551 is $84?
x% x $551 = $84 divide both sides by $551
x% =$84 / $551 =0.15245 x 100 =15.245%
This is what might be easy to remember:
part / whole * 100%
in this case $551 is the whole (100%), and $84 is the part
so $84 / $551 * 100% =15,2%