17: Numerator (A) Share Tweet Share tumblr reddit Numerator (A) Next, we simply plug the numbers into each of the three parts of the formula. Numerator Only (A</font color = “blue”>) N ( ΣXY ) – ( ΣX ) ( ΣY ) = 5 (49980) – (329) (755) = 249900 – 248395 = 1505