42/51 as a percentage is 82.35%. This fraction is a little more than four‑fifths, so you can picture it as a large portion of a whole. When you see the number 82.35%, you know it represents the same size as 42 out of 51 parts.
The fraction 42/51 can also be reduced to 14/17, which still gives the same percentage. Whether you write it as a fraction or a percent, the value stays consistent, making it easy to compare with other numbers.
In everyday use, 82.35% might show up on a report card, a test score, or a discount. Knowing that 42/51 translates directly to this percent helps you quickly understand how big the portion is without doing extra math.
