Cześć!
a)
[tex]\dfrac{100}{150}=\dfrac{100:50}{150:50}=\boxed{\frac{2}{3}}[/tex]
b)
[tex]\dfrac{18}{54}=\dfrac{18:18}{54:18}=\boxed{\frac{1}{3}}[/tex]
c)
[tex]\dfrac{36}{108}=\dfrac{36:2}{108:2}=\dfrac{18}{54}=\dfrac{18:18}{54:18}=\boxed{\frac{1}{3}}\\[/tex]
d)
[tex]\dfrac{30}{105}=\dfrac{30:5}{105:5}=\dfrac{6}{21}=\dfrac{6:3}{21:3}=\boxed{\frac{2}{7}}\\[/tex]
e)
[tex]\dfrac{120}{192}=\dfrac{120:2}{192:2}=\dfrac{60}{96}=\dfrac{60:6}{96:6}=\dfrac{10}{16}=\dfrac{10:2}{16:2}=\boxed{\frac{5}{8}}\\[/tex]
f)
[tex]\dfrac{126}{168}=\dfrac{126:2}{168:2}=\dfrac{63}{84}=\dfrac{63:7}{84:7}=\dfrac{9}{12}=\dfrac{9:3}{12:3}=\boxed{\frac{3}{4}}\\[/tex]
