Sum of two negative numbers is always

This is different from the first one can someone me

Dakota earned $7.50 in interest in account a and $18.75 in interest in account b after 15 months. if the simple interest rate is 4% for account a and 5% for account b, which account has the greater principal? explain. to make it a little easier, there is an image. good luck!

In an improper fraction, is the numerator equal to, less than, or greater than the denominator