25K should I pay down mortgage or invest at 7%

[Rob Smith]

I have $25K in savings and am putting 2-4k each month into this saving acc it is currently invested and making about 7%. My question is this should i keep investing it and make 7% APY or should i pay the $25k to principal  on one of my mortgages and also pay the 2-4k a month to the principal on my mortgate were is the better return on my money.