Answer:
Fraction of the dough nuts remains = Â [tex]\frac{1}{8}[/tex]
Step-by-step explanation:
Let total numbers of doughnuts is = x
The doughnuts ate by the teachers = [tex]\frac{21}{24} x[/tex]
The  doughnuts remains = total doughnuts - doughnuts ate by the teachers
⇒ [tex]x - \frac{21}{24} x[/tex] = [tex]\frac{x}{8}[/tex]
⇒ Fraction of the  doughnuts remains = [tex]\frac{1}{8}[/tex]
Therefore fraction of the dough nuts remains = Â [tex]\frac{1}{8}[/tex]