Subtract. Simplify and write your answer as a mixed number. 6 5/8 - 1 3/4

A) 5 1/2
B) 5 7/8
C) 4 7/8
D) 5 3/4

To subtract 1 3/4 from 6 5/8, we need to find a common denominator. The common denominator in this case is 8.

6 5/8 - 1 3/4 = (6 * 8 + 5) / 8 - (1 * 8 + 3) / 8
= (48 + 5) / 8 - (8 + 3) / 8
= 53/8 - 11/8

To subtract fractions with the same denominator, you subtract the numerators and keep the denominator the same.

= (53 - 11) / 8
= 42/8

The numerator is divisible by the denominator, so we can simplify this fraction.

= 5 1/4

Therefore, the answer is not listed among the given choices.