This is the standard payload compression ratio, expressed in the classic '1:x.xx' form with x.xx multiplied by 100 to store as an integer, computed from the pre- and post-payload-compression byte counters. This single number is what an admin reports as how much this satellite link's compression is buying them, and a value dropping toward 100, a ratio near 1:1.00, signals compression has essentially stopped helping for the current traffic mix. For example, a stored value of 250 represents a 1:2.50 ratio, meaning the link effectively carries 2.5 times the payload data its raw bandwidth would otherwise allow.