The fraction 21/37 is equal to 56.76% when converted to a percentage and rounded to two decimal places. This means that if you had 37 equal parts of something and took 21 of those parts, you'd have about 56.76% of the whole. It's a bit more than half, but not quite as much as three-fifths.
In everyday life, you might come across this fraction or percentage in various situations. For example, if 21 out of 37 people in a group agreed on something, you could say that 56.76% of the group was in agreement. Or if you completed 21 out of 37 tasks on your to-do list, you'd have finished about 56.76% of your work. It's a useful number to know for quick estimations and comparisons.