$$\frac{38\cdot5}{\frac{22}{7}}\times\frac{90}{360}$$
$\frac{665}{44}\approx 15.113636364$
$$\frac{190}{\frac{22}{7}}\times \frac{90}{360}$$
$$190\times \frac{7}{22}\times \frac{90}{360}$$
$$\frac{190\times 7}{22}\times \frac{90}{360}$$
$$\frac{1330}{22}\times \frac{90}{360}$$
$$\frac{665}{11}\times \frac{90}{360}$$
$$\frac{665}{11}\times \frac{1}{4}$$
$$\frac{665\times 1}{11\times 4}$$
$$\frac{665}{44}$$
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$\frac{5 \cdot 7 \cdot 19}{2 ^ {2} \cdot 11} = 15\frac{5}{44} = 15.113636363636363$
