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2014-09-20T10:42:57+03:00
X-192=60x/100
100x-19200=60x
100x-60x=19200
40x=19200
x=19200:40
x=480
6 4 6
2014-09-20T10:43:07+03:00
192......60%
x...........100%
 x=192*100/60=320
2 5 2