The half-life of a drug in the bloodstream is 9 hours. What fraction of the original drug dose remains in 24 hours? in 36 hours?

What fraction of the original drug dose remains in 24 hours? ____ (Do not round until the final answer. Then round to the nearest hundredth as needed.)

What fraction of the original drug dose remains in 36 hours? ____ (Do not round until the final answer. Then round to the nearest hundredth as needed.)