[tex]25\%\cdot 16=\frac{25}{100}\cdot16=\frac{25\cdot 4\cdot 4}{100}=\frac{100\cdot 4}{100}=4\\
22\%\cdot 45=\frac{22}{100}\cdot45=\frac{2\cdot11\cdot9\cdot5}{100}=\frac{99}{10}\\
70\%\cdot 80=\frac{70}{100}\cdot80=\frac{7\cdot10\cdot8\cdot10}{100}=7\cdot8=56\\
92\%\cdot 300=\frac{92}{100}\cdot300=\frac{92\cdot3\cdot100}{100}=92\cdot3=276\\
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