$$( \frac{ -8 }{ 9 } ) \times ( \frac{ -8 }{ 7 } )- \frac{ 8 }{ 7 } \times \frac{ 8 }{ 7 }$$
$-\frac{128}{441}\approx -0.290249433$
$$-\frac{8}{9}\times \frac{-8}{7}-\frac{8}{7}\times \frac{8}{7}$$
$$-\frac{8}{9}\left(-\frac{8}{7}\right)-\frac{8}{7}\times \frac{8}{7}$$
$$\frac{-8\left(-8\right)}{9\times 7}-\frac{8}{7}\times \frac{8}{7}$$
$$\frac{64}{63}-\frac{8}{7}\times \frac{8}{7}$$
$$\frac{64}{63}-\frac{8\times 8}{7\times 7}$$
$$\frac{64}{63}-\frac{64}{49}$$
$$\frac{448}{441}-\frac{576}{441}$$
$$\frac{448-576}{441}$$
$$-\frac{128}{441}$$
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$-\frac{128}{441} = -0.29024943310657597$
