Excel to Ignore Text and Sum Values

The array formula helped me parse everything which is great but now I thought I'd be able to perform the auto sum. It doesn't add correctly though.

Now my columns look like this

COLUMN A                 COLUMN B               COLUMN C
10.172.161.0/24	           20.0% (8/40)	              (8/40)
10.172.162.0/24	            5.0% (10/200)	      (10/200)
10.172.163.0/24	            0.0% (0/0)	              (0/0)
10.172.164.0/23	            58.0% (259/446)         (259/446)