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.
The winners of women and men singles events will take home massive Â£1.88 million each. The latest increase in the prize money made Wimbledon the highest paying grand slam in the world. A total of Â£26.75 Million ($42.2m USD) makes wimbledon the most lucrative tennis event.