Interpreting 10-YR TREAS 21/32 yield 2.913% As I see the WSJ front page, I saw 10-YR TREAS 21/32 yield 2.913%.
I know what the yield means but I don't know what the 21/32 means and how it relates to the yield. Could you please tell me?
I have not seen the page, but it is likely to either be the price change or part of the price of a $10$ year benchmark US Treasury bond (probably with a par value of $\$100$ and possibly with an nominal yield of $2.75\%$)

So either the price of this benchmark bond changed by $\$21/32= \$0.65625$ or the price was $\$98\; 21/32=\$98.65625$ 

Why US markets use eighths or sixteenths or thirty-seconds of a dollar when they have perfectly usable tenths and twentieths and hundredths (i.e. dimes, nickels and cents) to price bonds is another question.