How do you subtract one third from five ninths?

Answer 1

By making the fractions have a common denominator by appropriately multiplying the numerator also.

9 is divisible by 3, so the logical choice of denominator is 9. One multiplies 3 by 3 to get 9, so times the numerator of the third (1) by 3. This gives us five ninths minus three ninths, giving the answer of two ninths

5/9 - 1/3 = 5/9 - 3/9 = 2/9