обратите в десятичные дроби 9/20 7/40 11/400 21/168 35/280 47/376
9/20=0.45; 7/40=0,175; 11/400 =0,0275; 21/168=0,125; 35/280=0,125; 47/376=0,125
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9/20=0.45; 7/40=0,175; 11/400 =0,0275; 21/168=0,125; 35/280=0,125; 47/376=0,125