Step-by-step explanation:
[tex] \frac{12 {x}^{4} }{4 {x}^{16} } = \frac{4 \times 3}{4 \times {x}^{16 - 4} } = \frac{3 }{ {x}^{12} } \\ \\ so \: \frac{3 }{ {x}^{12} } \: is \: equivalent \: fraction \: \\ of \: \frac{12 {x}^{4} }{4 {x}^{16} } \\ [/tex]
