The town had 684 people then had a 25% growth spurt increasing the population by 684*.25 = 171 people

The town had 684 people then they added 171 people bringing the population to 684+171 = <<684+171=855>>855 people

There were 855 people and 40% moved away so it decreased by 855*.40 = 342

The population was 855 and 342 people moved away making the new population 855-342 = <<855-342=513>>513 people

# Answer

513
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Youngsville had a population of 684 people.  The town had a growth spurt and the population increased by 25% then they witnessed that 40% of the population moved away.  What is the current population?
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513
Youngsville had a population of 684 people.  The town had a growth spurt and the population increased by 25% then they witnessed that 40% of the population moved away.  What is the current population?
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