$$\frac{10}{9}-\frac{610}{357}$$
$-\frac{640}{1071}\approx -0.597572362$
$$\frac{1190}{1071}-\frac{1830}{1071}$$
$$\frac{1190-1830}{1071}$$
$$-\frac{640}{1071}$$
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$-\frac{640}{1071} = -0.5975723622782446$