Answer :
The percentage increase in the population of the chilrden since past year is 11.96%.
What is Percentage ?
A percentage is a number or ratio expressed as a fraction of 100 in mathematics. Although the abbreviations "pct.", "pct.", and occasionally "pc" are also used, the percent sign, "%," is frequently used to indicate it. A percentage is a number without dimensions and without a standard measurement.
According to the question, the town's population of children increased from 376 to 421 during the past year.
So, the increase in the population of the children is-
Increase =421-376
Increase =45
Now, the percentage increase in population of the children per year is calculated as-
Percentage Increase [tex]$=\frac{\text { Increase }}{376} \times 100 \%$[/tex]
Percentage Increase [tex]$=\frac{45}{376} \times 100 \%$[/tex]
Percentage Increase [tex]$=0.1196 \times 100 \%$[/tex]
Percentage Increase [tex]$=11.96 \%$[/tex]
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