$$( \frac { 4 } { 15 } ) ^ { 2 } - \frac { 13 } { 36 }$$
$-\frac{29}{100}=-0.29$
$$\frac{16}{225}-\frac{13}{36}$$
$$\frac{64}{900}-\frac{325}{900}$$
$$\frac{64-325}{900}$$
$$\frac{-261}{900}$$
$$-\frac{29}{100}$$
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$-\frac{29}{100} = -0.29$