A class has 30 boys and 20 girls, find the percentage of girls in the class.

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Solution

Total students in class = 30 + 20
= 50 ....[1 Mark]
$Hence, percentage of girls = \frac{Number of girls}{Total students} \times 100 = \frac{20}{50} \times 100 = 40 % . . . . . [2 Marks]$

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A class has 30 boys and 20 girls, find the percentage of girls in the class.

Total students in class = 30 + 20 = 50 ....[1 Mark] Hence, percentage of girls = Number of girlsTotal students×100 =2050×100 = 40% .....[2 Marks]

Total students in class = 30 + 20
= 50 ....[1 Mark]
$Hence, percentage of girls = \frac{Number of girls}{Total students} \times 100 = \frac{20}{50} \times 100 = 40 % . . . . . [2 Marks]$