Around 49 to 51 per cent.
It all depends on the region. Statistically, Asian countries have higher percentage of single men. However, If you look at some Eastern European countries, there is higher ration of single women. Once, I was doing a research and was browsing through female dating sites, and I found out that there are way more single ladies in Eastern Europe, but almost equal ratio of single men and women in the US.
The 2014 estimate is 1.014 men per woman.
About 1:1
5 men to 1 woman
49 men to 51 woman
I believe the ratio is 4 women to 1 man
9001 - 1
In a room in which there was only one woman and no men, the ratio would be infinite. You cannot get any greater than that!
Sevan men and Sevan woman per second
In Argentina the statistics solve to a ratio of approximately 95.7 men per 100 women
50.5 male vs 49.5 females
The USA
101 males to 100 females