In a fawn survival study in Centre County Pennsylvania during 2000-2001, 218 fawns were radioed and followed with telemetry equipment. Of these fawns, predators killed 22 percent, the leading source of mortality. Of the fawns killed by predators, most were killed by coyotes (49%) and bears (43%). Nearly 50% of all mortality occurred during the month of June, with 18 percent and 16 percent in July and August. It was interesting to note that 84 percent of fawn predation occurred on one of two study areas. This probably illustrates the difference in predation rates due to localized coyote populations.

So with your HR,I would think that 50% of fawns are killed by predators.