Answer: Fluffy's tail is [tex]\dfrac1{12}[/tex] m longer than Fireball's tail.
Step-by-step explanation:
Length of Fluffy's tail = [tex]1\dfrac13[/tex] m [tex]=\dfrac43[/tex] m
Length of Fireball's tail = [tex]1\dfrac14[/tex] m [tex]=\dfrac54[/tex] m
Difference = Length of Fluffy's tail - Length of Fireball's tail
[tex]=\dfrac43-\dfrac54=\dfrac{4\times4-5\times3}{3\times4}\\\\=\dfrac{16-15}{12}\\\\=\dfrac1{12}[/tex]
Hence, Fluffy's tail is [tex]\dfrac1{12}[/tex] m longer than Fireball's tail.