Example:

Example:

To find half of these fractions, multiply the denominator by 2.

Examples:

(1) Mixed Numbers with an Even Whole Number

32 7/8 is a mixed number with an even whole number (32).

In this case, divide the whole number by 2: 32/2 = 16
Use the shortcut for dividing a fraction: 7/8x2 = 7/16
Add them back together: 16 7/16

Half of 32 7/8 is 16 7/16

(2) Mixed Numbers with an Odd Whole Number

11 3/8 is a mixed number with an odd whole number (11).

Divide the whole number by 2: 11/2 = 5.5 (drop the decimal to make the whole number 5).
Add the numerator to the denominator: 3 + 8 = 11 (11 is the new numerator).
Double the denominator: 8 x 2 = 16 (16 is the new denominator).
When you put the two together, the fraction is 11/16.

Your final answer is 5 11/16

Each 0.01' is roughly equal to 1/8". There are ninety-six 1/8" in a foot and one hundred 0.01' in a foot.

These facts come in handy with grading when a surveyor says that you need to take off another 0.15'. A fast head calculation tells you that fifteen 1/8" equals 15/8 or 1 7/8".

You can add an extra 0.01' for every three inches to correct for the missing 0.04'.