That still leaves about 700 million people who can't afford the basic goods and services needed to survive. But it's the first time the rate has dropped below 10 percent, and it's well below the rate of 37.1 percent in 1990.
One of the World Bank's goals is to end extreme poverty by 2030. But reaching that milestone will be difficult, since many of the remaining poor live in fragile states racked by conflict, according to the bank's chief executive, Jim Yong Kim.
"Much of the low-hanging fruit has been picked," Kim told reporters on a conference call.
Decline in extreme poverty
Source / World Bank.
Almost half of the world's extreme poor live in sub-Saharan Africa, according to the 2015 projection. That's up from about 15 percent in 1990. By contrast, there have been dramatic declines in poverty in East and South Asia over the same period as China and India emerged as economic powers.
"In the areas where there are large numbers of people living in extreme poverty, extreme poverty has deepened and become more embedded," said Kim.
In addition to the new projection, the World Bank raised its definition of extreme poverty to income of $1.90 per day, from $1.25. The new poverty line adjusts for inflation using 2011 prices that account for purchasing power as a baseline.