Answer: 11 1/2 cm or 11.5 cm
Explanation:
To see how much taller the woman is than her son, we will subtract the son's height from the woman's height. We can convert these fractions into decimals to make it easier to subtract.
159 1/4 - 147 6/8 = 159.25 - 147.75 = 11.5 = 11 1/2 cm