The math teacher in me is getting at his incorrect formula with the lack of brackets. Even though I know exactly what he means lol. Runs+RBI-HR/GP. By math, you would do the HR divided by games first.
99 runs 42 home runs 127 rbi 160 gp. Therefore according to BEDMAS, Encarnacion's ZARP is 99+127-42/160 = 99+127-0.26 =225.74 (instead of 1.15)