9^5 = 3^10 (3^10 * 5^2)*(3^9 * 5^10) =3/5^8 = 3/390625 = 0.00000768 0.4 = 2/5, 2.5 = 5/2 (2^10/5^10)*(5^12/2^12) =5^2/2^2 =25/4 = 6.25 2.5 = 5/2, 4 = 2^2 2^10 * 5^5 /2^5 = 2^5 *5^5 = 10^5 = 100000 81 = 9^2 9^8/9^6 = 9^2 = 81