Soup

47% of pupils at the school to eat in the canteen, 1/47 of students who eat in the canteen eat lunch soup.

a) What percentage of pupils who eat in the canteen and eat soup for lunch?
b) What percentage of all pupils of school eat lunch soup?

Correct result:

a =  25 %
b =  11.75 %

Solution:

a=14100=25%a = \dfrac{1}{ 4}\cdot 100 = 25 \%
b=4710014100 b=47100a=11.75%b = \dfrac{ 47}{100} \cdot \dfrac{1}{ 4}\cdot 100 \ \\ b = \dfrac{ 47}{100} \cdot a = 11.75 \%



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