Номер 388 помогите зделать

388
1) НОЗ=715, т.к. 11; 13 и 5 взаимно простые числа, поэтому НОЗ=НОК=11×13×5=715

$\: \frac{3}{11} = \frac{3 \times 65}{11 \times 65} = \frac{195}{715 } \\ \frac{2}{13} = \frac{2 \times 55}{13 \times 55} = \frac{110}{715} \\ \frac{4}{5} = \frac{4 \times 143}{5 \times 143} = \frac{572}{715}$

2) НОЗ=1008
16=2×2×2×2
7=7
9=3×3
НОК=2×2×2×2×7×3×3=1008
$\frac{5}{16} = \frac{5 \times 63}{16 \times 63} = \frac{315}{1008} \\ \frac{6}{7} = \frac{6 \times 144}{7 \times 144} = \frac{864}{1008} \\ \frac{2}{9} = \frac{2 \times 112}{9 \times 112} = \frac{224}{1008}$

3) НОЗ=1320
15=3×5
8=2×2×2
11=11
НОК=3×5×2×2×2×11=1320
$\frac{13}{15} = \frac{13 \times 88}{15 \times 88} = \frac{1144}{1320} \\ \frac{5}{8} = \frac{5 \times 165}{8 \times 165} = \frac{825}{1320} \\ \frac{1}{11} = \frac{1 \times 120}{11 \times 20} = \frac{120}{1320}$