$\frac{25}{1000}=25‰$  

$\frac{3}{25}=\frac{12}{100}=\frac{120}{1000}=120‰$ $\frac{3}{25}=\frac{12}{100}=\frac{120}{1000}=120‰$  

$0,237=\frac{237}{1000}=237‰$  

$\frac{3}{8}=\frac{375}{1000}=375‰$  

$0,07=\frac{7}{100}=\frac{70}{1000}=70‰$