Question

complete the following sentence.
in 2020, the median age at first marriage of women in a certain country (27.8 years) was ____ percent less than the median age at first marriage of men in that country (30.7 years)

in 2020, the median age at first marriage of women in a certain country (27.8 years) was (square) percent less than the median age at first marriage of men in that country (30.7 years)
(round to one decimal place as needed.)

Explanation:

Step1: Calculate the difference in ages

$30.7 - 27.8=2.9$

Step2: Calculate the percentage

The formula for percentage change is $\frac{\text{difference}}{\text{original value}}\times 100\%$. Here the original value is the men's median age at first - marriage. So we have $\frac{2.9}{30.7}\times 100\%$.
$\frac{2.9}{30.7}\times 100\%=\frac{290}{30.7}\approx 9.4\%$

Answer:

$9.4$