42/66 as a percentage is 63.64%. This rounded figure tells you how much of a whole the fraction represents when you look at it in terms of hundredths.
The fraction 42/66 can be reduced by dividing both numbers by their greatest common divisor, which is 6. This gives the simpler form 7/11. Even in this reduced shape, the value stays the same, so it still equals 63.64% when expressed as a percent.
Knowing the percentage is useful in everyday situations—like figuring out a discount, comparing scores, or understanding data in graphs. It gives a quick, clear picture of how large the part is compared to the whole.
