Answer:
15%
Step By Step:
- 13 tennis
- 4 boots
- ? sandals
- 20 total students
20 - 13 - 4 = 3
3 students out of 20 total students wore sandals
do the math:
- 3÷20 = 0.15
- multiply 0.15 by 100 to get a percentage
- 0.15 × 100 = 15%
answer: 15% of students wore sandals