1 Answer

Sashel Niles Gruber · Answer 1 · 2023-10-23T01:38:06+0000

Notice that:

(1)

$(8)/(20)=(2\cdot4)/(5\cdot4)=(2)/(5)\text{.}$

Therefore:

$(8)/(20)=(2)/(5)\text{.}$

(2)

$\begin{gathered} (12)/(28)=(3\cdot4)/(7\cdot4)=(3)/(7), \\ (21)/(49)=(3\cdot7)/(7\cdot7)=(3)/(7)\text{.} \end{gathered}$

Therefore:

$(12)/(28)=(21)/(49)\text{.}$

(3)

$\begin{gathered} (10)/(18)=(5\cdot2)/(9\cdot2)=(5)/(9), \\ (15)/(27)=(5\cdot3)/(9\cdot3)=(5)/(9)\text{.} \end{gathered}$

Therefore:

$(10)/(18)=(15)/(27)\text{.}$

Answer: The 3 sets have in common that in each case both fractions represent the same number.

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