A liter of water weighs a kilogram so 15 mg/kg = 15 ppm on a mass over mass basis. If that is the flavor of ppm you want, done. But ppm can also be computed on a volume basis, molar ratio, etc. It is better tio use a clear form with units that identifies the basis such as mg/kg.
Serena Williams knocked off Lucie Safarova in the final of the women's draw at the French Open, and Bovada has her listed as the clear favorite on the odds to win Wimbledon this year; Williams sits as the 7/4 chalk on those betting lines.
Oldest Woman To Win A Grand Slam + 5 Other Records Serena Williams Broke With Wimbledon Title. Serena Williams created history by lifting her 21st Grand Slam title after beating Spanish challenger Garbine Muguruza 6-4, 6-4 in the Wimbledon final on Saturday. Here are some of the major landmarks she achieved after the glorious win. 1. World number one Serena is now the oldest woman to win a Grand Slam title. This year's Wimbledon title is her first since 2012. 2. At 33 years and 289 days, Serena surpasses Martina Navratilova as the oldest player to win Wimbledon, and any of the other three Grand Slams, in the Open era.