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how to calculate a number in percentage. Select the cell containing the number of which you want to find 10. Next divide this result by the old number in cell A1.
To convert the B2 value into percentages you need to apply percentage formatting to this cell. Select the cell in which you entered 10. To calculate a basic percentage in Excel use the Percent Style button under the Home TabNumber Group and apply it to the column where youd like to display the percent eg column D.
Subtract the original value from the new value.
Find X if P percent of it is Y. You can find it in the Home Number area. So 40 would be 40 divided by 100 or40. To calculate a percentage we look at the whole as equal to 100.