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2014-07-23T16:09:28+05:30

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Total no of children = 40
No of girls = 16
.·. No of boys = (40-16) = 24

Now,
% of girls present =  \frac{16}{40}  × 100 = 40%

% of boys present =  \frac{24}{40}  × 100 = 60%

.·. % of boys more than girls = (60-40)% = 20%

Answer: 20% of boys are more than girls.
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2014-07-23T16:09:35+05:30

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Number of children = 40
number of girls = 16
number of boys = 40-16= 24
to calculate percentage of boys in the class -- 24/40*100 = 60%
Percentage of girls = 40% 
difference in percentage =60-40=20
hence when compared to the number of girls , boys are 20% more in number.
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