\(a.\dfrac{3}{8}=\dfrac{21}{56};\dfrac{5}{7}=\dfrac{40}{56}\\ b.\dfrac{1}{5}=\dfrac{12}{60};\dfrac{2}{3}=\dfrac{40}{60};\dfrac{45}{60}\\ c.\dfrac{3}{16}=\dfrac{9}{48};\dfrac{5}{48};\dfrac{3}{8}=\dfrac{18}{48}\)
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