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To find the part-to-whole ratio for yellow, you need to divide the number of yellow shoes by the total number of students surveyed:
Part-to-whole ratio for yellow = Number of yellow shoes / Total number of students
= 16 / 60
Simplifying the ratio, you get:
Part-to-whole ratio for yellow = 4 / 15
So, the part-to-whole ratio for yellow written with a colon is:
4:15