Bond J has a coupon of $7\mathrm{.}2$ percent. Bond K has a coupon of $11\mathrm{.}2$ percent. Both bonds have $12$ years to maturity and have a YTM of $8\mathrm{.}4$ percent.

If interest rates suddenly rise by $1\mathrm{.}8$ percent, what is the percentage price change of these bonds? If interest rates suddenly fall by $1\mathrm{.}8$ percent, what is the percentage price change of these bonds?