34/51 as a percentage is 66.67%. This rounded value tells you how much of a whole the fraction represents when you look at it in terms of hundredths.
The fraction 34/51 can be reduced only a little, because 34 and 51 share a factor of 17. Dividing both numbers by 17 gives 2/3, which is a familiar ratio. Seeing the fraction as 2/3 helps you recognize that it is a little more than half.
When you compare 66.67% to other common percentages, it sits between 60% and 70%. That means if you had 100 items, about 67 of them would match the portion described by 34/51.
In everyday language, you can say that 34 out of 51 parts is roughly two‑thirds of the whole, or about 66.67%. This quick reference is useful for budgeting, grading, or any situation where a simple percentage makes the picture clearer.