Answer:
Given that,
The population of one city was about 230,000 in 2010.
The population of the city is projected to be about 190,000 in 2020.
Decreased population is,
[tex]=230000-190000[/tex][tex]=40000[/tex]The percent decrease is,
[tex]=\frac{decreased\text{ population}}{initial\text{ population}}\times100[/tex]Substituting the values we get,
[tex]=\frac{40000}{230000}\times100=17.391\text{ \%}[/tex]Rounding it to nearest tenth of a percent, we get
[tex]=17.4\text{ \%}[/tex]Answer is: 17.4%
