Question

[Phạm Thị Hương Giang]

-12/21:34/43

Answer 1

[Lê Minh Vũ]

\(-\dfrac{12}{21}\div\dfrac{34}{43}\)

\(=-\dfrac{12}{21}\times\dfrac{43}{34}\)

\(=-\dfrac{86}{119}\)

Answer 2

[Nguyễn Đức Trí]

\(-\dfrac{12}{21}:\dfrac{34}{43}=-\dfrac{12}{21}.\dfrac{43}{34}=-\dfrac{2}{7}.\dfrac{43}{17}=-\dfrac{86}{119}\)