A fraction is expressed as a unit fraction by dividing both the numerator and the denominator by the numerator. i.e. 12/84 = (12 / 12) / (84 / 12) = 1 / 7. Also 23 / 138 = (23 / 23) / (138 / 23) = 1 / 6. Therefore, 12/84 = 1/7 and 23/138 = 1/6.Hope this helps. Let me know if you need additional help!
