Question

Rút gọn phân số :

a, \(\frac{-63}{81}\) b, \(\frac{-25}{-75}\)

Answer 1

a) \(\frac{\left(-63\right)}{81}=\frac{\left(-63\right):9}{81:9}=\frac{-7}{9}\)

b) \(\frac{-25}{-75}=\frac{\left(-25\right):25}{\left(-75\right):25}=\frac{-1}{-3}=\frac{1}{3}\)

Answer 2

\(a.\frac{-63}{81}=\frac{-7}{9}\)

\(b.\frac{-25}{-75}=\frac{1}{3}\)

Answer 3

a,-7/9

b,1/3

Answer 4

a) \(\frac{-63}{81}\)= \(\frac{-63:9}{81:9}\)

                 = \(\frac{-7}{9}\)

b) \(\frac{-25}{-75}\)= \(\frac{25}{75}\)

                  = \(\frac{25:25}{75:25}\)

                  = \(\frac{1}{3}\)

Answer 5

a) -63/81 = -63 :9 /81 : 9 = -7/9

b) -25/-75 = -25:5/-75:5 = 1/3