First, count the tally marks and record the data in the frequency table. Shoe Lengths Length in Tally Centimeters Boys Girls 18 6 4 19 an 4. 20 9 9 21 7 5 22 10 7 To find the difference between the shoes that were 18 or 22 centimeters long and the shoes that were 20 centimeters long, subtract the sums. So, more shoes were 18 or 22 centimeters long than 20 centimeters long. A Question 1 of 5 Check Answer N​