[tex]1331.....................110\% \\ \\ p_{1}......................100\% \\ \\ p_{1} = \frac{133100}{110} = 1210 \: lei \: pretul \: saptamana \: trecuta \\ \\ 1210.......................110\% \\ \\ p_{2}.......................100\% \\ \\ p_{2} = \frac{12100}{110} = 1100 \: lei \: pretul \: acum \: doua \: saptamani \\ \\ 1100...................110\% \\ \\ p_{3}...................100\% \\ \\ p_{3} = \frac{110000}{110} = 1000 \: lei \: pretul \: acum \: trei \: saptamani [/tex]
