A fraction equivalent to 1/2 is:

Explanation

• Multiply the numerator and denominator of 1/2 by the same number 2, and you get 2/4.
• Divide 2/4 by 2 on the top and bottom and it returns to 1/2, which confirms the two fractions are equal.
• The other choices 3/8, 4/10 and 5/12 are all below half, because each numerator is smaller than half of its denominator.
• Quick test: a fraction equals 1/2 only when its denominator is exactly double its numerator, as in 2/4, 3/6 and 5/10.
• In decimal form 2/4 is 0.5, while 4/10 is 0.4 and 3/8 is only 0.375.