![]() Accordingly, the values in column D are decimal values, with the Percentage number format applied. For example, 95% is read as "Ninety-five percent" and is equivalent to 95/100 or 0.95. In mathematics, a percentage is a number expressed as a fraction of 100. This will first sum up the cells C2 to C9 and then subtract the. Taking the same example used above, the formula can now be written as C1-SUM (C2:C9). Here, you use the SUM function, to sum the cells that need to be subtracted together from the same cell. This example explains the general formula for increasing a number by a given percentage. This is a single-step method for subtracting in Excel. For example, with -10% in cell D5 (-0.10), the formula evaluates like this: =C5*(1-D5) Negative percentagesĪ negative percentage will have the effect of increasing the original price. The general formula for this calculation, where "x" is the new price, is: x=old*(1-percentage)Ĭonverting this to an Excel formula with cell references, the formula in E5 becomes: =C5*(1-D5)Īs the formula is copied down, the formula returns a new price for each item in the table, based on the percentages shown in column D. For example, given an original price of $70.00, and an decrease of 10% ($7.00), the result should be $63.00. In this example, the goal is to decrease the prices shown in column C by the percentages shown in column D.
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