\frac{1}{4}+\frac{1}{8}=1
\frac{2}{3}+\frac{2}{6}=1
\frac{1}{4}+\frac{1}{8}=1 fałsz
\frac{1}{4}+\frac{1}{8}=\frac{2}{8}+\frac{1}{8}=\frac{3}{8}
\frac{2}{3}+\frac{2}{6}=1 prawda
\frac{2}{3}+\frac{2}{6}=\frac{4}{6}+\frac{2}{6}=\frac{6}{6}=1