What is practice?

Practice refers to the act of repeatedly performing an activity or task in order to improve one's skills, knowledge, or proficiency in that particular area. It involves deliberate and focused effort, often involving repetition, to develop and refine abilities. Practice is commonly associated with various fields such as sports, music, art, academics, and professional disciplines. It is an essential component of learning and development, allowing individuals to enhance their performance, gain expertise, and achieve mastery in their chosen pursuits.

On the field trip,there are 5 teacher ,117 student and 16 parent what does the ratio 21:138 represent ?