Какие из дробей 43/112, 9/28, 3/14, 3/8, 1/4 меньше дроби 19/56?

112/2=56; 56/2=28; 28/2=14; 14/2=7; 7/7=1 112 = 2^4 * 7n
28/2=14; 14/2=7; 7/7=1, 28 = 2^2 * 7n
14/2=7; 7/7=1, 14 = 2*7n
8=2^3n
4=2^2n
56/2=28; 28/2=14; 14/2=7; 7/7=1 56 = 2^3 * 7n
НОК (112;28;14;8;4;56) = 2^4 * 7 = 112n
43/112, 9/28 * 4/4=36/112, 3/14 * 8/8=24/112, 3/8 * 14/14=42/112, 1/4 * 28/28=28/112,n
19/56 * 2/2 = 38/112. n
Ответ: 9/28, 3/14, 1/4