Question

(15a^2b^5-25a^5b^3)/(10ab^4)

Answer 1

$$
\cfrac{15a^2b^5-25a^5b^3}{10ab^4}\\
\text{common factor atop}
$$

Answer 2

from there just cancel out like-terms atop/bottom

Answer 3

so 15-25?

Answer 4

a^7?

Answer 5

& b^8?

Answer 6

well, for the numerator, what's common for 15 and 25? see above ^