Decrease by a percentage

1)\(decrease\quad 200\quad by\quad 5\ \%\)
\(190\)
2)\(decrease\quad 30\quad by\quad 20\ \%\)
\(24\)
3)\(decrease\quad 60\quad by\quad 25\ \%\)
\(45\)
4)\(decrease\quad 40\quad by\quad 15\ \%\)
\(34\)
5)\(decrease\quad 50\quad by\quad 65\ \%\)
\(17.5\)
6)\(decrease\quad 75\quad by\quad 75\ \%\)
\( 18.75\)
7)\(decrease\quad 45\quad by\quad 115\ \%\)
\(-6.75\)
8)\(decrease\quad 155\quad by\quad 55\ \%\)
\(69.75\)