According to PPP$,$

$\%$ change in the spot exchange rate

$=(1+$Home inflation rate$)/(1+$foreign inflation rate$)-1$

$=(1+$US inflation rate$)/(1+$British inflation rate$)-1$

$=(1+\%)/(1+\%)-1($Please enter whole numbers according to the problem$)$

$=3\mathrm{.}81\%$

So pound will $($appreciate or depreciate$)$ by $3\mathrm{.}81\%.$

If we use the approximated form,

$\%$ change in the spot exchange rate

$=$ Home inflation rate$-$foreign inflation rate

$=\%($Please enter a whole number according to your calculation$)$

This is very close to the $3\mathrm{.}81\%$ from the exact formula.