We are given the two way relative frequency table which shows the relative frequencies of late night workers and day workers who do or do not drink coffee.
Frequency of late night workers drinking coffee=0.733 and that of day workers=0.455
Frequency of late night workers who drink coffee=0.545 and that of the late night workers who do not drink coffee is 0.67.
Therefore, the percentage of late night workers who do not drink coffee is 0.267% which is equal to 26.7.
