What fraction of a circle is 100 degrees?

To determine the fraction of a circle that 100 degrees represents, we need to consider that a full circle is 360 degrees. Therefore, we can calculate this as a fraction by dividing the given angle (100 degrees) by the total degrees in a circle (360 degrees). This gives us the fraction 100/360, which simplifies to 5/18. So, 100 degrees represents 5/18 of a circle.