Answer:
The last year population was 66864.
Step-by-step explanation:
It is given that the population of a town grew 15% up to 76,894.
Let the last year population be x.
The population increased by 15% up to 76894.
[tex]x+\frac{15}{100}x=76894[/tex]
[tex]\frac{100x+15x}{100}=76894[/tex]
[tex]\frac{115x}{100}=76894[/tex]
[tex]115x=7689400[/tex]
[tex]x=66864.3478[/tex]
[tex]x\approx 66864[/tex]
Therefore, the last year population was 66864.
