Question

the population of a country increases by 5% in the first year and 7% by the second year. At the end of the second year the population was 40446. What was the population at the beginning

Answer 1

Let the population in the beginning be x.
Then, 40446 = x*(1+ 5/100)*(1+ 7/100)
40446 = x*105/100*107/100
40446*100/105*100/107 = x
3.6*100*100 = x
36000=x
Therefore, the population in the beginning was 36000.
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