Computer is almost 100% accurate. why?​

Because a computer is a machine, every single calculation done by a computer is correct. The computer is programmed in such a way that computers can never make a mistake

     The computer is 100% accurate. Because a computer is a machine, which is completely dependent on us humans. You can also call it the computer limitation. Like we instruct the computer. In the same way, the computer starts doing that instruction completely and correctly. Just depends on the person giving the instruction, whether he gives the computer the correct instructions or the wrong instructions.

   Normal computers are, in fact, 100% reliable, in much the same way that gravity is 100% reliable. The last time that we witnessed a mistake being made with a computer processor was in 1994 with the now infamous (if you happen to move in those circles) Pentium FDIV floating point hardware bug that apparently resulted in 1 in every 9 billion floating point divisions coming out with the wrong answer. That might not seem too terrible, but it was a pretty serious problem at the time, causing Intel to recall the chip at the cost of just under half a billion dollars, which would be three quarters of a billion dollars in today’s money.

     You can’t really blame the Pentium FDIV processor for the mistake, though. The poor bit of silicone was only doing what it was told. The problem happened because human engineers made a mistake when they built it. This hasn’t happened since, not because human engineers no longer make mistakes, but because human engineers have improved the way in which they test for and correct the mistakes that they make.