Some Duke Energy customers have digital meters. This type of meter records electricity usage in the same way that a car's odometer records mileage. You read the numbers from left to right.
In the illustration below, the January reading is 7235 kilowatt-hours and the February reading is 8390 kilowatt-hours.
In this example, 1155 kilowatt-hours were used between the January and February meter readings (8390 - 7235 = 1155).