Reading :

Example: 5 rings Resistance in order: red yellow red black gold read as 242Ω

Error is ±0.5%
Example: 5 ring Resistance in sequence: orange, white, yellow, red, silver read 39400Ω=39.4K

error is ±10%
Example: 5 ring Resistance is: orange orange red gold red, where orange orange red is 332Ω multiplied by 0.1=33.2Ω

Error is ±2%

From the above, reading the fourth Colour ring as gold or silver must pay attention, because it is multiplied by negative number.

About the error rate: the number of the error rate of the software must be multiplied by 100, if the number of the error is calculated to show 0.02, multiplied by 100=2%