When you have kidney disease, your kidneys are no longer able to remove waste effectively from your body or to balance your fluids. The build up of wastes can change the chemistry of your body causing some symptoms that you can feel, and others that you don't.
Reference to a range of cells is typically of the form (A1:A6), which specifies all the cells in the range A1 through to A6. A formula such as =SUM(A1:A6) would add all the cells specified and put the result in the cell containing the formula itself.
Type in the formula to convert minutes and seconds into a decimal number representing hours into the cell you selected. For example, type =(A1-INT(A1))*24 into cell B1, then press Enter. This formula converts the time you entered into a fraction of a day, then converts this fraction into hours.