9/12-4/14= eching

$$\frac { 9 } { 12 } - \frac { 4 } { 14 } =$$

Baholash

$$\frac{13}{28}\approx 0,464285714$$

Yechim qadamlari

\frac{9}{12} ulushini 3 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$\frac{3}{4}-\frac{4}{14}$$

\frac{4}{14} ulushini 2 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$\frac{3}{4}-\frac{2}{7}$$

4 va 7 ning eng kichik umumiy karralisi 28 ga teng. \frac{3}{4} va \frac{2}{7} ni 28 maxraj bilan kasrlarga aylantirib oling.

$$\frac{21}{28}-\frac{8}{28}$$

\frac{21}{28} va \frac{8}{28} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{21-8}{28}$$

13 olish uchun 21 dan 8 ni ayirish.

$$\frac{13}{28}$$

Omil

$$\frac{13}{2 ^ {2} \cdot 7} = 0,4642857142857143$$