## Elementary Technical Mathematics

a) $\frac{4}{3}$ b) $3\frac{3}{4}$ c) $1\frac{1}{2}$
To convert a mixed number to an improper fraction, multiply the denominator by the whole number portion, then add the product to the numerator. $1\frac{1}{3}=\frac{(3\times1)+1}{3}=\frac{4}{3}$ To convert an improper fraction to a whole number, divide the numerator by the denominator. The quotient becomes the whole number portion of the mixed number. The remainder becomes the numerator of the fractional portion. $15\div4=3,\ R:3$ $\frac{15}{4}=3\frac{3}{4}$ $3\div2=1,\ R:1$ $\frac{3}{2}=1\frac{1}{2}$