Question

20 divided by one fourth

Answer 1

$\frac { 20 }{ \frac { 1 }{ 4 } } \\ \\ =\frac { 20 }{ 1 } \cdot { \left( \frac { 1 }{ 4 } \right) }^{ -1 }$

$\\ \\ =\frac { 20 }{ 1 } \cdot { \left( \frac { 4 }{ 1 } \right) }^{ 1 }\\ \\ =\frac { 20 }{ 1 } \cdot \frac { 4 }{ 1 } \\ \\ =\frac { 80 }{ 1 } \\ \\ =80$