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Which two of these fractions multiply together to give [tex]\frac{9}{28}[/tex]?

[tex]\frac{1}{4} \quad \frac{6}{23} \quad \frac{2}{7} \quad \frac{3}{5} \quad \frac{9}{8}[/tex]


Sagot :

To determine which two of the given fractions multiply together to yield [tex]\(\frac{9}{28}\)[/tex], we can manually check each pair through multiplication until we find a match or determine there isn't one. Here are the step-by-step checks:

Given fractions:
[tex]\[ \frac{1}{4}, \frac{6}{23}, \frac{2}{7}, \frac{3}{5}, \frac{9}{8} \][/tex]
Target fraction:
[tex]\[ \frac{9}{28} \][/tex]

Now, let's multiply each possible pair of fractions and see if any of them equal [tex]\(\frac{9}{28}\)[/tex].

### 1. Multiply [tex]\(\frac{1}{4}\)[/tex] with each other fraction:

[tex]\[ \frac{1}{4} \times \frac{6}{23} = \frac{1 \times 6}{4 \times 23} = \frac{6}{92} = \frac{3}{46} \][/tex]
[tex]\[ \frac{1}{4} \times \frac{2}{7} = \frac{1 \times 2}{4 \times 7} = \frac{2}{28} = \frac{1}{14} \][/tex]
[tex]\[ \frac{1}{4} \times \frac{3}{5} = \frac{1 \times 3}{4 \times 5} = \frac{3}{20} \][/tex]
[tex]\[ \frac{1}{4} \times \frac{9}{8} = \frac{1 \times 9}{4 \times 8} = \frac{9}{32} \][/tex]

None of these results match [tex]\(\frac{9}{28}\)[/tex].

### 2. Multiply [tex]\(\frac{6}{23}\)[/tex] with each remaining fraction:

[tex]\[ \frac{6}{23} \times \frac{2}{7} = \frac{6 \times 2}{23 \times 7} = \frac{12}{161} \][/tex]
[tex]\[ \frac{6}{23} \times \frac{3}{5} = \frac{6 \times 3}{23 \times 5} = \frac{18}{115} \][/tex]
[tex]\[ \frac{6}{23} \times \frac{9}{8} = \frac{6 \times 9}{23 \times 8} = \frac{54}{184} = \frac{27}{92} \][/tex]

None of these results match [tex]\(\frac{9}{28}\)[/tex].

### 3. Multiply [tex]\(\frac{2}{7}\)[/tex] with each remaining fraction:

[tex]\[ \frac{2}{7} \times \frac{3}{5} = \frac{2 \times 3}{7 \times 5} = \frac{6}{35} \][/tex]
[tex]\[ \frac{2}{7} \times \frac{9}{8} = \frac{2 \times 9}{7 \times 8} = \frac{18}{56} = \frac{9}{28} \][/tex]

Here, we find:

[tex]\[ \frac{2}{7} \times \frac{9}{8} = \frac{9}{28} \][/tex]

Thus, the two fractions that multiply together to give [tex]\(\frac{9}{28}\)[/tex] are [tex]\(\boxed{\frac{2}{7} \text{ and } \frac{9}{8}}\)[/tex].