15^2 x 4^5 x 5^0 x 7^1
____________________ (divided by)
12^2 x 25 x 98
3^2 x 5^2 x 2^10 x 1 x 7
----------------------------------
2^4 x 3^2 x 5^2 x 2 x 7^2
2^10 x 3^2 x 5^2 x 7
----------------------------
2^5 x 3^2 x 5^2 x 7^2
= 2^5/7 = 25/7