Answer:
1/60466176
Step-by-step explanation:
Given: (6^2)^4 ÷ 6^18
Parentheses: 36^4 ÷ 6^18
36^4 ÷ 36^9 (Because 6^18=6^2^9=36^9)
36^-5 (Exponents get subtracted)
1/(36^5)
1/60466176
Another way:
(6^2)^4 ÷ 6^18
6^(2*4) ÷ 6^18
6^8 ÷ 6^18
6^(8-18)
6^-10
1/(6^10)
1/60466176