10) 3 - 2/5 =

Convert the whole number to a fraction with the same denominator: $$3 = \frac{15}{5}$$. Subtract the fractions: $$\frac{15}{5} - \frac{2}{5} = \frac{13}{5}$$. Convert back to a mixed number: $$\frac{13}{5} = 2 \frac{3}{5}$$.