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2014-09-19T09:42:11+03:00
[21 / 5 : 22 / 25 + 1,5 : 0,1(6) ]  x 100 =

[\frac{21}{5}:\frac{22}{25}+ \frac{15}{10}: \frac{16-1}{90}]*100 = \\ = [\frac{21}{5}* \frac{25}{22} + \frac{15}{10}* \frac{90}{15}]*100 =\\ =[\frac{105}{22}+ 9]*100= \\  =[\frac{105}{22}+ \frac{198}{22} ]*100 = \\ = \frac{303}{22}*100 = \\ = \frac{30300}{22}=\frac{15150}{11}