Result: 9.98 millimeters is about 25/64 of an inch.
The answer is 25/64 inch. The result is sometimes only an approximation of the real value because of rounding. But it's accurate enough for typical everyday measurements.
To convert 9.98 millimeters to an inch fraction, you need to first convert 9.98 millimeters to inches. Since 1 inch is equal to 25.4 millimeters, divide 9.98 by 25.4 to get decimal inches:
9.98 mm ÷ 25.4 = 0.3929 in
Then, let's convert the decimal value of 0.3929 inches to a fraction.
To convert 0.3929 inches to a fraction, use a ruler or a decimal to fraction conversion table to find the nearest fraction with a reasonable denominator (fractional inches usually have denominators that are powers of 2, such as 2, 4, 8, 16, 32, 64).
In this example, use a ruler to find the closest fraction.
Using a ruler, you can see that 0.3929 inches is very close to 25/64 inch.
Therefore, 9.98 millimeters is approximately equal to 25/64 inch.