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# How do you find the cumulative relative frequency?

It's a matter of adding up and taking percentages

If you have a frequency table, you add a few columns to your table:

- Cumulative frequency
- Relative frequency
- Cumulative relative frequency

**Cumulative frequency**
You add the frequencies up to and including for the value

**Relative frequency**
You express the frequency as a fraction or percentage of total sum of frequencies

**Cumulative relative frequency**
You express the cumulative frequency as fraction or percentage of the total sum of frequencies

**Simple example**
Say you have frequencies:
##1-3-4-8-3-1## for 6 different values (total ##20##)

Then your relative frequencies will be: ##5%-15%-20%-40%-15%-5%##

Your cumulative frequencies will be: ##1-4-8-16-19-20##

And your cumulative relative frequencies will be: ##5%-20%-40%-80%-95%-100%##