To find fractions equivalent to 1/4, you need to multiply both the numerator (top) and denominator (bottom) by the same number.
For example, 1/4 is equal to (1x7) / (4x7) or 7/28.
Going through possible options:
1/4 = (1x2) / (4x2) = 2/8
1/4 = (1x3) / (4x3) = 3/12
1/4 = (1x4) / (4x4) = 4/16
And there’s your answer.
The other way to approach this is to divide each denominator by 4 and see if you get the value in the numerator.
12÷4 = 3, but the first fraction was not 3/12.
16÷4 = 4 and the second fraction IS 4/16
15÷4 = 3.75, but the third fraction was not 3.75/15
90÷4 = 22.5, but the third fraction was not 22.5/90