6^-3 / 6^5
Because the numerator has a negative exponent, use the negative exponent rule b^-n = 1/b^n
To do this move 6^-3 to the denominator:
1 / (6^5 * 6^3)
When you multiply identical numbers with exponents you add the exponents so (6^5 * 6^3) becomes 6^8
Now you have 1 / 6^8
Now raise 6 to the power of 8 to get:
1/1679616
Depending on the format your answer needs to be in you have 3 different answers:
1) 1/6^8 ( Leaving it as an exponent)
2) 1 / 1679616 (As a fraction)
3) 5.9537 x 10^-7 (As a decimal, round as needed)