According to a recent report, 40% of new businesses in 2013 were started by women. In 2013, 20% of new businesses started by women had revenues of $50,000 and above, whereas 21% of new businesses started by men had revenues of $50,000 and above. A new business started in 2013 is selected at random and it had revenues of at least $50,000. What is the probability that the business was started by a woman?