How much of a circle does a 100-degree angle turn through?

A 100-degree angle turns through approximately 27.78% of a circle.

To determine how much of a circle a 100-degree angle turns through, you need to find the angle measure as a fraction of a full circle.

A full circle is 360 degrees, so you can find the fraction by dividing the given angle measure by 360:

100 degrees / 360 degrees = 0.2778

Therefore, a 100-degree angle turns through approximately 0.2778, or about 27.78% of a full circle.