We use the ROUNDDOWN function to round a number down, not minding the number being rounded to a specified number of decimal places. We will walk through the process of using the ROUNDDOWN function in simple steps.
Figure 1- Results of using the ROUNDDOWN function
- “Number” – number to round down
- “num_digits – the number of decimal places to round down the number.
Setting up the data
- We will input the numbers to be rounded up in the range: B4:B10
- Next, we specify the number of digits in the range C4:C10
- We will place the results in Column D, which we name “Results.”
Figure 2 – Setting up the Data
Applying the Excel ROUNDDOWN function
- We will click on Cell D4
- We will insert the formula below in Cell D4
Figure 3 – Applying the ROUNDDOWN function
- We will press the enter key
Figure 4- Cell containing a rounded down number
- We will use the fill handle tool to copy the formula into the other cells to get the results.
Figure 5-How to use the Excel ROUNDDOWN function
The ROUNDDOWN function will always round numbers 1-9 down. This is unlike the standard rounding that rounds numbers less than 5 down. It works like the Excel ROUND function and positive digits will be rounded to the right of the decimal point while zero and negative numbers will be rounded to the left.
- If num_digits is > 0, the number will be rounded to the right of the decimal point
- If num_digits is < 0, the number is rounded down to the left of the decimal.
- If num_digits = 0, the number is rounded down to the left of the decimal point
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