The population of a town increased by 25%, 10% and then decreased by 15% in three years. If the current population of town is 18700, find the population of town three years ago?
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Answer:
21856
Step-by-step explanation:
25% rise in population of 18700 in year one = 25×18700/100
∆P=4675
new population P = p+∆p=23375
∆p2=10×23375/100=2337.5 approx 2338
new population P2=25713
∆p3=15×25713/100=3857approx
new population P3=P2-∆p3(fall in population)
P3=25713-3857=21856
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