Craig saved $3,655.11, and yegar saved $4,190.67. how much more did yegar save than craig? a. $536.66

This is a simple subtraction problem, but since you are in Elementary School, I will help you out.

Subtract $4,190.67 by $3,655.11 (remember, the bigger number should come first)

 4,190.67
-3,655.11
        ...56

When a small number is on top of a bigger number, borrow 1 number from the number next to it (in this case, 0 is smaller than 5, so you must borrow 1 number from 9, making it to 8), then add the small number by 10 (0+0=10)
Then we continue...

 4,190.67
-3,655.11
     35.56

Do the same thing with 4 and 1.

 4,190.67
-3,655.11
   535.56

$535.56