$$\cfrac{5}{-3}$$
$$\cfrac { -5\times 2 }{ -3\times 2 } =\cfrac { 10
}{ -6 } ,\cfrac { 5\times 3 }{ -3\times 3 } =\cfrac { 15 }{ -9 } ,\cfrac
{ 5\times 4 }{ -3\times 4 } =\cfrac { 20 }{ -12 } ,\cfrac { 5\times 5
}{ -3\times 5 } =\cfrac { 25 }{ -15 } $$
Therefore the four
equivalent rational numbers are $$\cfrac { 10 }{ -6 } ,\cfrac { 15 }{ -9
} ,\cfrac { 20 }{ -12 } ,\cfrac { 25 }{ -15 } $$