To find fractions equivalent to 35, we can express 35 as a fraction. We can write it as \( \frac{35}{1} \).
Now, we can determine which of the given fractions are equivalent to \( \frac{35}{1} \) by checking if they reduce to the same value or if the cross multiplication shows them as equal.
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\( \frac{21}{35} \): This can be simplified by dividing both numerator and denominator by 7: \[ \frac{21 \div 7}{35 \div 7} = \frac{3}{5} \]
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\( \frac{15}{25} \): This can be simplified by dividing both numerator and denominator by 5: \[ \frac{15 \div 5}{25 \div 5} = \frac{3}{5} \]
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\( \frac{5}{12} \): This fraction is already in its simplest form and does not relate to 35.
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\( \frac{3}{10} \): This fraction is also in simplest form and does not relate to 35.
Therefore, the two fractions that are equivalent to 35 from the options are:
- \( \frac{21}{35} \)
- \( \frac{15}{25} \)
These are the correct selections.