A class has 30 boys and 20 girls. Find : (i) the percentage of girls in the class. (ii) the percentage of boys in the class. (iii) percentage of number of boys as compared with number of girls.
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(i) Percentage of girls = 20/50 × 100 = 40%
(ii) Percentage of boys = 30/50 × 100 = 60%
(iii) Boys/Girls × 100 = 30/20 × 100 = 150%
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Answer:
part 1
- number of boys = 30
- number of girls = 20
- total number of students = 20+30 =50
Step-by-step explanation:
percentage = number of boys ÷ total number of students × 100
= (30÷50)×100
=3÷5×100
=3×2
=60%
part 2
- so , total percentage of students is 100%
- percentage of boys is 60%
- percentage of girls=total percentage of students - percentage of boys
- percentage of girls = 100% - 60%
= 40%
part 3
percentage of number of boys as compared with number of girls = 60:40
=6:4
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