No, because if you do -17/-40 you would get a positive answer of 0.425 and it would not equal -0.425.
By your description, my answer is 10.2in x 20%= 20.808 inches of last years rain
I = Prt
.. = 13,000*.15*4
.. = 7800
A) You will pay $7,800 in interest after 4 years.
B) You pay back the principal plus the interest.
.. $13,000 +7,800 = $20,800
See how many times the denominator goes into the numerator. For example, with 24/8, 8 goes into 24 three times, so 24/8 is 3. If I had 25/8, then it would be 3 1/8 because you have one left over after you divide the 8 into 25.