`C = {1 + 1/2 + 1/4 + 1/8 + 1/16}/{1 - 1/2 + 1/4 - 1/8 + 1/16}`
`16C = {16 . (1 + 1/2 + 1/4 + 1/8 + 1/16)}/{16 . (1 - 1/2 + 1/4 - 1/8 + 1/16)}`
`16C = {16 + 8 + 4 + 2 + 1}/{16 - 8 + 4 - 2 + 1}`
`16C = {31}/{11}`
`C = {31}/{11} : 16`
`C = {31}/{11} . 1/16`
`C = 31/176`