cr = n1 / n2 n1 and n2 are number of information carrying units (bits) in 2 data sets that represent the same information  (original and compressed data)
cr = n1 / n2 n1 and n2 are number of information carrying units (bits) in 2 data sets that represent the same information  (original and compressed data)
relationship b/w uncompressed digital data files &  compressed  ex: 10: 1 = 10%