Question

Answer 1

\(a,\dfrac{21\times15\times9}{7\times45\times18}=\dfrac{3\times7\times15\times9}{7\times15\times3\times9\times2}=\dfrac{1}{2}\\ b,\dfrac{24\times11\times27}{33\times8\times12\times9}=\dfrac{12\times2\times11\times3\times9}{11\times3\times8\times2\times6\times9}=\dfrac{12}{8\times6}=\dfrac{12}{48}=\dfrac{1}{4}\)

Answer 2

a \(\dfrac{1}{2}\)

b \(\dfrac{1}{4}\)

Answer 3

\(a,\\ =\dfrac{3}{3\times2}=\dfrac{3}{6}=\dfrac{1}{2}\\ b,\\ =\dfrac{2\times3}{3\times8}=\dfrac{6}{24}=\dfrac{1}{4}\)

Answer 4

1/2

1/4