we know that
Yesterday's price was $9.54 ----------> represents the 100% percentage
Applying proportion
Find out how much percentage represents the difference (9.67-9.54)
so
[tex]\begin{gathered} \frac{100\%}{9.54}=\frac{x}{\left(9.67-9.54\right)} \\ \\ x=\frac{100\operatorname{\%}}{9.54}*(9.67-9.54) \\ \\ x=1.4\% \end{gathered}[/tex]