D. \( 7 \frac{1}{8}-3 \)

Let's dive into the world of fractions, shall we? To solve \( 7 \frac{1}{8} - 3 \), first convert the mixed number into an improper fraction. Multiply 7 by 8 (which equals 56) and then add 1, giving us \( \frac{57}{8} \). Now, convert 3 into a fraction with a denominator of 8, resulting in \( \frac{24}{8} \). Subtract \( \frac{24}{8} \) from \( \frac{57}{8} \) to get \( \frac{33}{8} \). You can also convert this back to a mixed number, which becomes \( 4 \frac{1}{8} \)! Looking for a fun way to remember your fraction and mixed number operations? Picture a pizza – after you’ve taken your three slices away from the delicious 7 1/8 slices, how many are left? Using visual reminders can help solidify those subtraction skills, making math as satisfying as your favorite treat!