$$\{(-\frac{3}{4})^{-7}\times(\frac{16}{9})^{-3}\}\times\frac{5}{5}$$
$-\frac{4}{3}\approx -1.333333333$
$$\left(-\frac{3}{4}\right)^{-7}\times \left(\frac{16}{9}\right)^{-3}\times 1$$
$$-\frac{16384}{2187}\times \left(\frac{16}{9}\right)^{-3}$$
$$-\frac{16384}{2187}\times \frac{729}{4096}$$
$$-\frac{4}{3}$$
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$-\frac{4}{3} = -1\frac{1}{3} = -1.3333333333333333$
