{% hint style="success" %} Deciles are similar to Percentiles, as they split the data into 10% groups. {% endhint %}
The 1st decile is the 10th percentile (the value that divides the data so that 10% is below it).
The 2nd decile is the 20th percentile (the value that divides the data so that 20% is below it). Etc!