30/69 as a percentage is 43.48%. This is the rounded value you get when you express the fraction in terms of a whole number out of 100.
The fraction 30/69 can be reduced to 10/23, which still represents the same part of a whole. Whether you write it as 30/69, 10/23, or 43.48%, the meaning stays the same: a little less than half of the total.
Knowing this percentage is handy for quick comparisons. For example, if you scored 30 out of 69 points on a test, you earned about 43.48% of the possible points, which tells you how you performed at a glance.
