28 over 138 as a unit fraction is 14/69.
To express 28/138 as a unit fraction, we need to find the reciprocal of this fraction, which is a fraction where the numerator is 1.
28/138 as a unit fraction:
28/138 = 1/x
To find the value of x, we can calculate it by taking the reciprocal of 28/138:
x = 1/28/138
Divide both the numerator and denominator by the GCD:
28/138 = (2 × 14) / (2 ×69)
Simplify the expression, we have;
14/69
Therefore, 28 over 138 as a unit fraction is 14/69.