\(\frac{9}{4}.\frac{7}{17}+2\frac{1}{4}.\frac{3}{17}-2,25.\frac{13}{17}\)
\(=\frac{9}{4}.\frac{7}{17}+\frac{9}{4}.\frac{3}{17}-\frac{9}{4}.\frac{13}{17}\)
\(=\frac{9}{4}.\left(\frac{7}{17}+\frac{3}{17}-\frac{13}{17}\right)\)
\(=\frac{9}{4}.\frac{-3}{17}\)
\(=\frac{-27}{68}\)
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