(2) $3 \frac{3}{4} \div 5=$
\(\boxed{\frac{3}{4}}\)
Step 1 :Convert the mixed number $3 \frac{3}{4}$ to an improper fraction: $\frac{3 \times 4 + 3}{4} = \frac{15}{4}$
Step 2 :Divide the improper fraction by 5: $\frac{15}{4} \div 5 = \frac{15}{4} \times \frac{1}{5}$
Step 3 :Multiply the fractions: $\frac{15 \times 1}{4 \times 5} = \frac{15}{20}$
Step 4 :Simplify the fraction: $\frac{15}{20} = \frac{3 \times 5}{4 \times 5} = \frac{3}{4}$
Step 5 :\(\boxed{\frac{3}{4}}\)