Assuming initially that the required reserve ratio $=15\%,$ the currency$-$deposit ratio $=40\%,$ and the excess reserve ratio $=5\%,$ an increase in the excess reserve ratio to $10\%$ causes the M$1$ money multiplier to $\_\_\_\_\_\_\_\_,$ everything else held constant.

Question $6$ options:

increase from $2\mathrm{.}15$ to $2\mathrm{.}33$

decrease from $2\mathrm{.}33$ to $2\mathrm{.}15$

increase from $1\mathrm{.}54$ to $1\mathrm{.}67$

decrease from $1\mathrm{.}67$ to $1\mathrm{.}54$