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## Question

primary 5 | Maths
| Fractions

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Boys + Girls = 2 units

Total = 3 units

Adults + Boys = 2 units

Girls = 3 units

Total = 5 units

We know that the total number of people doesn't change. So we make the number of units the same.

Adults = 1 unit → x 5 = 5 units

Boys + Girls = 2 units → x 5 = 10 units

Total = 3 units → x 5 = 15 units

Adults + Boys = 2 units → x 3 = 6 units

Girls = 3 units → x 3 = 9 units

Total = 5 units → x 3 = 15 units

So Adults = 5 units, Girls = 9 units

Difference = 4 units

Since there were 400 more girls than adults,

400 = 4 units

1 unit = 400 ÷ 4 = 100

Number of people at the stadium

= 15 units

= 100 x 15

= 1500