1) $$\frac{21}{7}$$ = 21 : 7 = 3;
2) $$\frac{114}{19}$$ = 114 : 19 = 6;
3) $$\frac{240}{15}$$ = 240 : 15 = 16.
Ответ: 1) 3; 2) 6; 3) 16.