Context: Visits to the websites have decreased by 87% since the paywall was introduced, from 21 million unique users per month to 2.7 million. In April 2009, the timesonline site had a readership of 750,000 readers per day. As of October 2011, there were around 111,000 subscribers to The Times' digital products.

Question: Visits to The Times website have decreased by how much since October 2011?

Answer: 87%