To convert a fraction to a percentage, we need to multiply the fraction by 100. So, to convert 55/100 to a percentage, we will multiply it by 100.

55/100 x 100 = 55%

Therefore, 55/100 as a percentage is 55%. This means that if we have a whole of 100, 55 parts of it will be represented by the fraction 55/100 or 55%.

In other words, if we have a pizza with 100 slices, and we eat 55 slices, we have eaten 55/100 or 55% of the pizza.