2 / 1 + 4 / 1 + 8 / 1 + ··· + 256 / 1 simple calculation process

2 / 1 + 4 / 1 + 8 / 1 + ··· + 256 / 1 simple calculation process

Each number is subtracted by one, and the sum of the following numbers is the sum of an equal ratio sequence
A total of 8 numbers, that is, 8 minus one-half plus one-quarter plus one eighth plus one sixteenth. The following summation uses the formula of equal ratio sequence summation = 255 / 256