John runs a computer software store. He counted 120 people who walked by his store in a day, 50 of whom came into the store. Of the 50, only 21 bought something in the store. Estimate the probability...

John runs a computer software store. He counted 120 people who walked by his store in a
day, 50 of whom came into the store. Of the 50, only 21 bought something in the store.
Estimate the probability that a person who walks by the store will come in and buy
something. Round your answer to the nearest hundredth.