book Maths Puzzle Numerical Ability

Need Help please!
2) Use the geometric sequence of numbers 1, 3, 9, 27, … to find the following:
a) What is r, the ratio between 2 consecutive terms?
Answer:
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book Other Question
What formula do I use to show what percentage of 1,664 is 18?

If Ann works a 32-hour week, except for 2 months of the year, her actual hours worked in a year is 1,646, not (32 * log6(b2 + 2) + log62 = 2