|Band 1||Band 2||Band 3||Band 4|
|Value 1 (MSV)||Value 2||Weight||Tolerance|
Resistance (Ohm) = [1st Band ] [2nd Band] x [MULTIPLIER] ± %[TOLERANCE]
Assume Y is [1st Band ] [2nd Band] x [MULTIPLIER]
Then % of Tolerance will be (Tolerance x Y)/100
From the above picture of resistor you can make it as example and apply the formula above.
1st Band (Red Band) = 2
2nd Band (Violet Band) = 7
Multiplier (Green Band) =100000
Tolerance (Gold) = 5%
Resistance (ohm) = 2 7 x 100000 ± 5% = 2700000±5% = 2700000 ± 135000 (ohm)
The Resistance value is inclusive in range of 2565000(ohm) to 2835000(ohm) .
You can find the color code values for each band in the following table .