15$\frac{2}{7}$ + 4$\frac{3}{4}$ - 2$\frac{2}{3}$

15$\frac{2}{7}$+4$\frac{3}{4}$ - 2$\frac{2}{3}$ 

= $\frac{107}{7}$  + $\frac{19}{4}$  - $\frac{8}{3}$ 

= $\frac{561}{28}$  - $\frac{8}{3}$ 

= $\frac{1459}{84}$