<human>:  Joe had 200 data points on his dataset. He then added 20% more data points to the dataset. If he reduced the data points by 1/4 of the total data points, calculate the total number of data points the dataset contains.
<bot>: How many data points did Joe add? ** When Joe added 20% more data points to the dataset, the data points in the dataset increased by 20/100*200 = <<20/100*200=40>>40 data points.
How many data points are in the dataset? ** The total number of data points increased to 200+40 = <<200+40=240>>240
How many data points did Joe reduce? ** If he reduced the data points by 1/4 of the total data points, the data points reduced by 1/4*240 =60
How many data points are left in the dataset after Joe reduced the data points by 1/4 of the total data ** The total number of data points left in the dataset after Joe reduced the data points by 1/4 of the total data points is 240-60= <<240-60=180>>180
#### 180