51/68 = 51:17/68:17 = 3/4

Chúc bạn học tốt!! ^^

\(\dfrac{3}{4}\) nhé

\(\dfrac{51}{68}=\dfrac{51:17}{68:17}=\dfrac{3}{4}\)

e cần gấp ạ

a: Phân số tối giản là 25/27; 77/79

b: 51/34=3/2

77/99=7/9

120/201=40/67

351/621=13/23

-51/34 = -3/2

Hok tốt !

\(\frac{-51}{34}=\frac{-51:17}{34:17}=\frac{-3}{2}\)

TL:

Ta có: \(\frac{-51}{34}=\frac{-51:17}{34:17}=\frac{-51}{34}\)

Vậy\(-\frac{51}{34}=-\frac{51:17}{34:17}=-\frac{3}{2}\)

CHÚC BẠN HỌC TỐT NHÉ.

\(\dfrac{74}{100}=\dfrac{37}{50}\)
\(\dfrac{34}{51}=\dfrac{2}{3}\)
\(\dfrac{2525}{2727}=\dfrac{25}{27}\)
\(\dfrac{135135}{500500}=\dfrac{27}{100}\)

3/2 tick cho minh that nhieu 

\(\frac{51}{34}=\frac{3}{2}\) \(nhé\)

\(\frac{3}{2}\)

\(\frac{34}{51}=\frac{2}{3}\)

các phân số bằng 2/3 và có mẫu số nhỏ hơn 30 là: 4/6; 6/9; 8/12; 10/15; 12/18; 14/21; 16/24.

34/51=2/3

các phân số bằng nó là :

  2/3;4/6;6/9;8/12;10/15;12/18;14/21;16/24;18/27

cảm ơn nghia

3/4

\(\frac{12}{30}=\frac{2}{5}\)

\(\frac{20}{45}=\frac{4}{9}\)

\(\frac{28}{70}=\frac{2}{5}\)

\(\frac{34}{51}=\frac{2}{3}\)

\(\frac{12}{30}\)= \(\frac{12:6}{30:6}\)= \(\frac{2}{5}\)

\(\frac{20}{45}\)=\(\frac{20:5}{45:5}\)=\(\frac{4}{9}\)

\(\frac{28}{70}\)=\(\frac{28:7}{70:7}\)=\(\frac{4}{10}\)=\(\frac{4:2}{10:2}\)=\(\frac{2}{5}\)

\(\frac{34}{51}\)=\(\frac{34:14}{51:14}\)=\(\frac{34:17}{51:17}\)= \(\frac{2}{3}\)

\(\frac{12}{30}=\frac{12:6}{30:6}=\frac{2}{5}\)

\(\frac{20}{45}=\frac{20:5}{45:5}=\frac{4}{9}\)

\(\frac{28}{70}=\frac{28:14}{70:14}=\frac{2}{5}\)

\(\frac{34}{51}=\frac{34:17}{51:17}=\frac{2}{3}\)