40/55 as a percentage is 72.73%. This number comes from turning the fraction into a decimal and then into a percent, rounded to two decimal places.
The fraction 40/55 can be reduced to 8/11, which still represents the same value. Whether you write it as 40/55, 8/11, or 0.7273, the size of the part stays the same.
In everyday life, you might see this kind of percentage when dealing with scores, discounts, or statistics. Knowing that 40 out of 55 is about 72.73% helps you quickly gauge how large a portion something is compared to the whole.
