It has a mass of roughly 10^27 kg (per the article, it is very comparable to Jupiter in mass). Using a loss of 10 million (or 10^7) kg per second , we can calc

It has a mass of roughly 10^27 kg (per the article, it is very comparable to Jupiter in mass). Using a loss of 10 million (or 10^7) kg per second , we can calculate that the planet is losing 10^7 / 10^27 percent of its mass per second: 10^7 / 10^27 = 10^(-20) % = 0.00000 00000 00000 00001 % of its mass per second If we change the time interval to one year, then we simply multiply the number of seconds in year (32 million, roughly), which moves the leading digit 7 places to the left. The resulting answer is that the planet is losing 3*10^-13 %, or 0.00000 00000 003 %, of its mass per year =)