Question

Найти у
/ Будет как дробь
1/5:у=6/25:3/20

Answer 1

1/5:у=6/25:3/20
1/5:у=8/5
у=1/5*5/8
у=1/8

Answer 2

$\frac{ \frac{1}{5} }{y} = \frac{ \frac{6}{25} }{ \frac{3}{20} } \\ \frac{1}{5y} = \frac{6 \times 20}{25 \times 3} \\ \frac{1}{5y} = \frac{2 \times 4}{5} \\ \frac{1}{y} = \frac{8}{1} \\ 8y = 1 \\ y = \frac{1}{8}$