84.31% is what you get when you turn the fraction 43/51 into a percentage. This number tells you how much of a whole 43 is when the whole is split into 51 equal parts.
The fraction 43/51 is already pretty close to one whole, so it makes sense that the percentage is in the mid‑80s. In everyday language, you could say “about 84 percent” and still be accurate for most casual uses.
If you ever need to compare this to other fractions, just remember that a higher numerator or a lower denominator will push the percentage higher, and the opposite will bring it down.
In short, 43 out of 51 is the same as 84.31%, a handy figure for quick estimates and simple calculations.