employees in health sector year 2011=12.5%of 80 million=10 million

employees in service sector year 2011= =20%of 80 million= 16 million

for 10 million employees of health sector there are 16 million service sector employees

for 5 employees of health sector there will be 5*16/10=8 service sector employees

n will be 8
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This one is simple, it essentially gives us a ratio, for every 5 people in health, there are n in services

We can write this as 5:n, which we can write as 10:2n (multiply the ratio by 2)

Now we can calculate these values from the pie chart.

Health employment is 0.125*80 million = 10 million
Services employment is 0.2*80 million = 16 million

Now we can equate the two ratios, 10:2n = 10:16

Thus 2n = 16 and n = 8

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