[(340-280):280]*100= eching

$$[ ( 340 - 280 ) : 280 ] \times 100 =$$

Baholash

$$\frac{150}{7}\approx 21,428571429$$

Yechim qadamlari

60 olish uchun 340 dan 280 ni ayirish.

$$\frac{60}{280}\times 100$$

\frac{60}{280} ulushini 20 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$\frac{3}{14}\times 100$$

\frac{3}{14}\times 100 ni yagona kasrga aylantiring.

$$\frac{3\times 100}{14}$$

300 hosil qilish uchun 3 va 100 ni ko'paytirish.

$$\frac{300}{14}$$

\frac{300}{14} ulushini 2 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$\frac{150}{7}$$

Omil

$$\frac{2 \cdot 3 \cdot 5 ^ {2}}{7} = 21\frac{3}{7} = 21,428571428571427$$